Knowledge Tree
pregnancy
synthesized from dimensionsPregnancy is the physiological state initiated when a fertilized ovum implants in the uterine endometrium ovum implantation begins pregnancy, egg fertilized attaches. This process marks a transition from the cyclic preparation of the female reproductive system—which readies the uterus through the follicular and luteal phases of the menstrual cycle—to a sustained period of fetal development prepares for pregnancy. Upon implantation, the developing embryo produces human chorionic gonadotropin (hCG), which rescues the corpus luteum from the degradation that would otherwise trigger menstruation hCG rescues corpus, corpus luteum rescued.
The corpus luteum serves as the primary source of progesterone and estrogen during the early stages of gestation, maintaining the uterine lining and supporting the embryo corpus luteum progesterone in pregnancy, produces pregnancy hormones. As pregnancy progresses, the placenta assumes the role of nourishing the fetus and producing hormones essential for childbirth and lactation placenta hormones for childbirth. The hormone relaxin, secreted by the corpus luteum, placenta, and uterine lining, plays a critical role in late pregnancy by relaxing pelvic ligaments to facilitate childbirth relaxin sources during pregnancy, relaxin relaxes pelvic ligaments.
Physiological adaptations during pregnancy are extensive and systemic. The body undergoes significant changes, including the expansion of plasma volume physiological plasma expansion, the expansion of the uterine corpus uterus corpus expansion, and the doubling in size of the ovaries ovaries more than double in size. Immunological shifts occur as well, characterized by the transfer of IgG antibodies across the placenta IgG transfer across placenta and the emergence of immature neutrophils immature neutrophils in pregnancy. Neurological changes, sometimes colloquially referred to as "pregnancy brain," have been associated with observed decreases in grey matter grey matter decreases, causing 'pregnancy brain'.
Clinical management of pregnancy focuses on mitigating risks and supporting maternal and fetal health. Anaemia is a significant concern, with mean haemoglobin concentrations declining as pregnancy advances haemoglobin decline, risk of anaemia. Public health initiatives emphasize nutritional supplementation, such as folic acid to prevent neural tube defects folic acid benefits, and iodine to prevent congenital hypothyroidism WHO recommendations. While some populations utilize traditional herbal remedies for symptoms like nausea, medical experts urge caution due to limited safety evidence herbal medicine caution.
The experience of pregnancy is further influenced by sociodemographic factors, including education and social support, which can impact maternal health outcomes risk factors for anaemia. Research into pregnancy complications, such as preeclampsia or preterm birth, increasingly focuses on the role of inflammation and immune activation maternal immune activation from infection. Ultimately, pregnancy is a complex biological state requiring careful medical monitoring to ensure the well-being of both the pregnant individual and the developing fetus.
Model Perspectives (5)
openrouter/google/gemini-3.1-flash-lite-preview definitive 95% confidence
Pregnancy is a physiological state involving significant biological changes, such as the expansion of plasma volume, which contributes to increased risks of anaemia as the pregnancy progresses physiological plasma expansion, risk of anaemia. Research indicates that mean haemoglobin concentrations decrease significantly from the first to the third trimester haemoglobin decline, and the prevalence of anaemia rises from 44.7% in the first trimester to 69.4% in the third anaemia prevalence.
Sociodemographic factors play a substantial role in maternal health; studies in Nigeria highlight that being single, having lower levels of education, and having no formal education are associated with increased odds of anaemia, potentially due to limited social or financial support risk factors for anaemia, unmarried women risk. Nutritional status is also critical, with the World Health Organization (WHO) recommending micronutrient supplementation (iron, vitamin A) and salt fortification (iodine) to support fetal development and prevent complications like congenital hypothyroidism WHO recommendations. Adequate folic acid intake is specifically noted to reduce the risk of neural tube defects folic acid benefits.
Beyond clinical interventions, maternal health is influenced by dietary habits, which fluctuate due to seasonality and availability dietary fluctuations. While some populations turn to traditional herbal medicines to manage pregnancy-related symptoms like nausea, there is a call for caution due to a lack of robust safety evidence for certain plants herbal medicine caution. Consequently, public health experts emphasize prioritizing care for vulnerable pregnant populations, particularly in regions with high anaemia prevalence public health prioritization.
openrouter/x-ai/grok-4.1-fast definitive 85% confidence
Pregnancy involves the implantation of a fertilized egg in the uterus, a hollow pear-shaped organ that supports fetal development, as described by Cleveland Clinic and Medscape. According to the Endocrine Society, the placenta secretes progesterone to maintain pregnancy, preventing new egg production and supporting the uterine lining, while low progesterone levels increase risks of miscarriage or pre-term delivery. Human chorionic gonadotropin (hCG) signals the corpus luteum to sustain progesterone for early pregnancy (Raleigh OB/GYN Centre). The highest conception likelihood occurs with intercourse near ovulation (Cleveland Clinic). During pregnancy, ligaments relax for childbirth (El Camino Health), ovaries more than double in size (Medscape), and grey matter decreases, causing 'pregnancy brain' (Northwestern Medicine). Other changes include rising progesterone preparing breasts for milk (mitocare) and potential nausea addressed by traditional remedies (Springer). Risks encompass maternal immune activation from infection altering fetal brain development (Vanderbilt University) and anemia treated with plants (Springer). Margie Profet hypothesized morning sickness prevents toxin ingestion (Wikipedia). Studies note possible right-sided ovulation favoring pregnancy (National Center for Biotechnology Information). B vitamins may reduce early pregnancy neurological risks (NewYork-Presbyterian). Researchers like Kelly Jurado study inflammation's pregnancy impact (Chan Zuckerberg Initiative).
openrouter/x-ai/grok-4.1-fast definitive 68% confidence
Pregnancy begins when a fertilized ovum implants in the uterine endometrium ovum implantation begins pregnancy. During pregnancy, the corpus luteum initially produces progesterone until about 10 weeks of gestation corpus luteum progesterone in pregnancy, which plays a crucial role alongside its importance in the menstrual cycle's second half (Preston's Pharmacy). The placenta nourishes the fetus and produces hormones preparing for childbirth and breastfeeding (EBSCO) placenta hormones for childbirth, while also releasing relaxin along with the corpus luteum and uterine lining (Endocrine Society) relaxin sources during pregnancy. At pregnancy's end, relaxin relaxes pelvic ligaments to facilitate birth (Endocrine Society) relaxin relaxes pelvic ligaments, though high levels may contribute to membrane rupture and premature birth per some researchers. Physiological adaptations include IgG antibodies crossing the placenta (Children's Hospital of Philadelphia) IgG transfer across placenta, presence of immature neutrophils (Blazkova et al., Nature) immature neutrophils in pregnancy, expanded uterine corpus (Cleveland Clinic) uterus corpus expansion, increased hypoxic ventilatory response linked to hormonal changes (L. G. Moore et al., Journal of Applied Physiology), and inflammation providing immune protection but risking premature birth or preeclampsia if excessive (Chan Zuckerberg Initiative). The vagina serves as the birth canal (Wikipedia). A woman can become pregnant without orgasm (SEER Training). Health concerns include anaemia among pregnant women in Nigeria with no regional association to diet diversity (PLOS Global Public Health; Oyewole Oyerinde O et al.), yeast infections pregnancy risk for yeast infections, and chronic inflammation. Studies like those using DHS data highlight covariates such as trimester and demographics in anaemia research (PLOS Global Public Health). Placenta-on-a-chip models study immunological mechanisms for complications (Chan Zuckerberg Initiative). Suspected pregnancy warrants medical contact (Cleveland Clinic).
openrouter/x-ai/grok-4.1-fast definitive 65% confidence
Pregnancy is the physiological state initiated when a fertilized egg attaches to the uterine lining during the luteal phase, as described by NewYork-Presbyterian egg fertilized attaches. This process produces human chorionic gonadotropin (hCG), which rescues the corpus luteum and sustains its function beyond the typical luteal phase hCG rescues corpus, preventing luteolysis and breakdown that would otherwise lead to menstruation corpus luteum rescued. The corpus luteum produces 'pregnancy hormones' such as progesterone and estrogen to maintain the uterine lining for the developing embryo, according to Cleveland Clinic produces pregnancy hormones. In the absence of pregnancy, hormone withdrawal from declining corpus luteum activity causes shedding of the endometrial lining, as noted by the National Center for Biotechnology Information hormone levels fall. The menstrual cycle overall prepares the body for potential pregnancy through phases like follicular and luteal, where estrogen and progesterone rise to thicken the lining prepares for pregnancy, with highest conception likelihood around ovulation per Cleveland Clinic highest near ovulation. Studies referenced include Fukuda et al. (2000) suggesting right-sided ovulation favors pregnancy outcomes (Human Reproduction) and others on risks like maternal smoking linked to SIDS (Schoendorf and Kiely, Pediatrics).
openrouter/x-ai/grok-4.1-fast 65% confidence
Pregnancy involves the female reproductive system creating a protective environment for a developing fetus, as described by Wikipedia entry on female reproductive system. This system matures at puberty to support fertilization and pregnancy. Preparatory processes include the uterine cycle's three phases (menses, proliferative, and secretory), which prepare the uterus for potential fertilization and pregnancy, according to Kenhub on uterine cycle. The follicular phase readies the body for pregnancy by maturing eggs in the ovaries, per Raleigh OB/GYN Centre. Post-ovulation, the corpus luteum produces progesterone and estrogen to support potential pregnancy, as noted by Clue app. A study by PLOS Global Public Health examined food-based strategies for anemia in pregnancy in rural Nepal, using complete case analysis adjusted for clustering and weights, per Nepal anemia study and study methodology.
Facts (159)
Sources
Dietary diversity insufficiently explains differences in prevalence of ... journals.plos.org 37 facts
measurementAmong the pregnant women included in the study, 52.0% were in the 20–29 age group, 43.1% had a parity of 2–4, and 61.0% were rural residents.
claimSociodemographic and obstetric factors, specifically being single, being in the second or third trimester of pregnancy, and having a lower level of education, were associated with an increased risk of anaemia in pregnancy.
measurementPregnant women in the North-Central region of Nigeria had 90% higher adjusted odds of anaemia in pregnancy (aOR: 1.90; 95% CI: 1.13–3.16) compared to pregnant women in the North-West region.
referenceMaternal vitamin A deficiency during pregnancy is related to maternal and neonatal hemoglobin concentrations among poor Egyptian families.
measurementThe prevalence of anaemia among pregnant women increases significantly as the trimester advances, ranging from 44.7% (95% CI: 39.1-50.4%) in the first trimester to 69.4% (95% CI: 64.5-74.0%) in the third trimester (p < 0.001).
measurementA facility-based study in two states of Nigeria found a 41% prevalence of iron deficiency among pregnant women with moderate or severe anaemia.
referenceSholeye OO, Animasahun VJ, and Shorunmu TO published a 2017 facility-based study in the Journal of Family Medicine and Primary Care titled 'Anemia in pregnancy and its associated factors among primary care clients in Sagamu, Southwest, Nigeria.'
measurementThe South-East region had the highest prevalence of anaemia among pregnant women at 71.1% (95% CI: 62.3-78.7%), while the South-West region had the lowest prevalence at 55.2% (95% CI: 43.8-66.1%).
referenceEkpotu KB, Ekanem U, and Adedeji O published a 2022 study in the Nigerian Health Journal titled 'Prevalence of anaemia in pregnancy and its associated factors in Akwa Ibom State, Nigeria.'
measurementThe adjusted odds of anaemia in pregnancy were more than double for women in their second and third trimesters compared to those in their first trimester (p < 0.001).
measurementThe Demographic and Health Surveys (DHS) data used in the study did not include information on iron and other micronutrient supplement intake among pregnant women.
claimIn the study of pregnant women in Nigeria, most participants did not consume foods from group 6 (eggs) or group 8 (vitamin A-rich fruits and vegetables like mango, pawpaw, watermelon, tomato, and carrots).
claimWithin each of the six regions in Nigeria, there was no statistically significant association between MDD-W and anaemia among pregnant women.
referencePlasma volume expands across the course of a healthy pregnancy.
referenceOyewole Oyerinde O et al. published a 2023 study in the journal Inquiry titled 'Factors Affecting Anemia in Pregnancy Women in Ibeju-Lekki, Lagos State, Nigeria.'
measurementThe study defined the primary outcome as the presence of anaemia, measured using a Hemocue 301 device, defined as a haemoglobin concentration of less than 11g/dl regardless of the trimester of pregnancy.
claimThe risk of anaemia increases as pregnancy progresses, likely due to the expansion of plasma volume resulting in physiological haemodilution.
referenceShi H et al. published a 2022 study in JAMA Network Open titled 'Severity of Anemia During Pregnancy and Adverse Maternal and Fetal Outcomes.'
referenceBabah OA et al. published a 2024 cross-sectional study in BMC Pregnancy and Childbirth titled 'Prevalence of and risk factors for iron deficiency among pregnant women with moderate or severe anaemia in Nigeria.'
measurementThe survey used a multistage sampling technique to select 42,000 households, from which 14,000 reproductive-age women were screened for anaemia, with pregnant women from this sub-sample included in the study.
claimDaily dietary intake is subject to fluctuations over time, including before and during pregnancy, and is influenced by the seasonality of food availability.
measurementThe overall prevalence of anaemia among pregnant women in the study was 61.1% (95% CI: 58.0-64.2%), with statistically significant differences across the six regions (p = 0.038).
claimDietary diversity alone is insufficient to explain the differences in the prevalence of anaemia in pregnancy across different regions.
measurementAcross six regions in Nigeria, most pregnant women consumed foods from between three to five food groups.
referenceUgwu and Uneke (2020) conducted a systematic review of iron deficiency anaemia in pregnancy within Nigeria.
referenceVitamin A deficiency during pregnancy is associated with negative effects on maternal and child health.
referenceDarnton-Hill and Mkparu (2015) examined micronutrients in pregnancy within low- and middle-income countries.
measurementThere was no statistically significant difference in the mean haemoglobin concentration among pregnant women across the six regions (p = 0.422).
claimThe study analyzed several covariates including age groups (15–20, 20–29, 30–39, or 40–49 years), trimester of pregnancy, place of residence (rural/urban), religion, ethnicity, marital status, employment status, highest level of education, parity, and household wealth quintile.
claimThe study recommends prioritizing public health care interventions for less educated women in their second and third trimesters of pregnancy, specifically in the North-Central and South-East regions of Nigeria.
claimSociodemographic factors, specifically not being married and having no formal education, were associated with higher odds of anaemia in pregnant women in Nigeria.
referenceA mixed methods study in rural plains Nepal assessed food-based strategies to address anemia in pregnancy.
measurementThe mean haemoglobin concentration among pregnant women drops significantly as the trimester advances, with the highest values observed in the first trimester and the lowest in the third trimester (p < 0.001 for the general pregnant population; p = 0.02 for the anaemic sub-group).
claimUnmarried pregnant women in Nigeria had higher odds of anaemia compared to married women, potentially due to a lack of social and financial support from a partner.
procedureThe study population consisted of reproductive-aged women who were pregnant at the time of the survey and provided written informed consent for anaemia screening.
measurementIn Nigeria, the consumption of food group 1 (grains, white tubers, plantain, and roots) was significantly lower in the South-West region, which also recorded the lowest prevalence of anaemia in pregnancy compared to other regions.
procedureThe study on anaemia in pregnancy utilized a complete case analysis approach, excluding observations with missing values in any variables, and adjusted all analyses for clustering, stratification, and sampling weights without applying imputation techniques.
Reproductive Hormones endocrine.org Jan 24, 2022 10 facts
claimThe placenta secretes progesterone after it develops, which supports the corpus luteum and maintains elevated progesterone levels throughout pregnancy to prevent the production of additional eggs.
claimAnti-Müllerian Hormone (AMH) acts as a gatekeeper for fertility and reproductive development, and is essential for fetal development during pregnancy.
claimProgesterone prepares the endometrium for potential pregnancy after ovulation by triggering the lining to thicken to accept a fertilized egg and by prohibiting uterine muscle contractions that would cause the body to reject an egg.
claimWomen with low progesterone levels who become pregnant are at a higher risk for miscarriage or pre-term delivery because progesterone helps maintain pregnancy.
claimIn women, relaxin levels increase after ovulation during the second half of the menstrual cycle to relax the uterine wall in preparation for pregnancy.
claimThe corpus luteum breaks down if a woman does not become pregnant, which lowers progesterone levels and triggers menstruation.
claimSigns of low progesterone include abnormal uterine bleeding, irregular or missed periods, spotting and abdominal pain during pregnancy, and frequent miscarriages.
claimAt the end of pregnancy, relaxin helps relax the ligaments in the pelvis to allow the pelvis to stretch as the baby leaves the mother's body.
claimSome researchers have suggested that high relaxin levels may cause a pregnant woman's membranes to rupture, potentially leading to premature birth, though this has not been proven.
claimRelaxin is a hormone secreted in the ovary by the corpus luteum, and during pregnancy, it is also released by the placenta and the uterine lining.
Understanding the Phases of the Menstrual Cycle - Clue helloclue.com 8 facts
measurementIf pregnancy does not occur, the corpus luteum breaks down after about 9-11 days.
claimIn the late secretory phase, the body produces prostaglandins, which are hormone-like compounds that can cause cramps to help shed the uterine lining if pregnancy does not occur.
claimIndividuals should consider consulting a healthcare provider if they skip periods for more than three months in a row while not pregnant.
claimDuring the luteal phase, progesterone and estrogen levels rise and then fall if pregnancy does not occur, which contributes to premenstrual symptoms like mood changes, headaches, acne, bloating, and breast tenderness.
claimDuring the proliferative phase, which occurs from the end of the period until ovulation, the uterus rebuilds and thickens its lining to prepare for a potential pregnancy.
claimDuring the proliferative phase (occurring around days 6–14), the uterus rebuilds and thickens its lining to prepare for potential pregnancy, while the ovaries prepare eggs (oocytes) for release.
claimDuring the luteal phase of the ovarian cycle (which corresponds to the secretory phase of the uterine cycle), the corpus luteum forms and releases hormones to prepare for a possible pregnancy.
claimAfter ovulation, the empty follicle transforms into the corpus luteum, which produces progesterone and some estrogen to support a potential pregnancy.
4 Phases of Menstrual Cycle: Hormone Changes Chart - Liv Hospital int.livhospital.com Mar 19, 2026 7 facts
claimIf pregnancy does not occur, the corpus luteum breaks down, leading to a decrease in estrogen and progesterone levels, which initiates the start of a new menstrual cycle.
claimThe follicular phase is primarily characterized by the rise of follicle-stimulating hormone (FSH) and estrogen to develop an egg, whereas the luteal phase is characterized by the rise of progesterone to prepare for pregnancy.
claimIf pregnancy does not occur during the luteal phase, progesterone levels drop, causing the menstrual cycle to restart.
claimDuring the follicular phase, estrogen thickens the uterine lining in preparation for pregnancy and influences physical and emotional health.
claimBefore a menstrual period begins, progesterone and estrogen levels rise to prepare the uterine lining; if pregnancy does not occur, these hormones drop sharply, which can cause premenstrual syndrome (PMS) symptoms.
claimThe rise in estrogen during the follicular phase is stimulated by follicle-stimulating hormone (FSH) produced by the pituitary gland, and this estrogen promotes the growth of the uterine lining in preparation for pregnancy.
claimThe luteal phase occurs during days 16-28 of the menstrual cycle and is characterized by progesterone preparing the uterus for pregnancy.
The Normal Menstrual Cycle and the Control of Ovulation - NCBI - NIH ncbi.nlm.nih.gov Aug 5, 2018 6 facts
referenceFukuda M. et al. published a study in 2000 in Human Reproduction titled 'Right-sided ovulation favours pregnancy more than left-sided ovulation,' which suggests a lateral bias in ovulation outcomes.
claimSome studies suggest that ovulation occurs more commonly from the right ovary and that right-sided ovulation carries a higher potential for pregnancy.
referenceO'Grady J.P. et al. published a 1972 study in the journal Prostaglandins regarding the effects of indomethacin, an inhibitor of prostaglandin synthesis, on ovulation, pregnancy, and pseudopregnancy in rabbits.
claimIf the corpus luteum is not rescued by pregnancy, it undergoes atresia, and the resulting progesterone withdrawal causes menses.
claimIf pregnancy does not occur, the corpus luteum undergoes luteolysis under the influence of estradiol and prostaglandins and forms scar tissue called the corpus albicans.
claimIn the absence of pregnancy, steroid hormone levels fall due to declining corpus luteum function, and progesterone withdrawal results in increased coiling and constriction of the spiral arterioles, leading to menstruation.
Editorial: Dietary diversity indicators: cultural preferences and health ... frontiersin.org 5 facts
claimAdequate intake of folic acid early in pregnancy significantly reduces the risk of neural tube defects.
claimMaternal nutritional status is crucial for fetal growth and development, as indicated by epidemiological studies on the association between dietary diversity during pregnancy and birth outcomes.
claimHealthy eating habits contribute to the prevention of overweight and obesity during pregnancy and reduce long-term health risks.
claimMothers with good nutritional status are more likely to maintain good mental health during pregnancy.
claimFolic acid supplementation is recommended in many countries for women planning pregnancy, even before conception.
Menstrual Cycle (Normal Menstruation): Overview & Phases my.clevelandclinic.org Dec 9, 2022 5 facts
claimDuring the luteal phase, progesterone levels rise to prepare the uterine lining for potential pregnancy.
claimA menstrual cycle is a reproductive system process that prepares the body for a possible pregnancy, beginning with the shedding of the uterine lining.
claimIf an egg is fertilized and implants in the uterine wall, pregnancy occurs; if pregnancy does not occur, estrogen and progesterone levels drop, causing the uterine lining to shed during the period.
claimThe menses phase of the menstrual cycle begins on the first day of a period and involves the shedding of the uterine lining through the vagina if pregnancy has not occurred.
claimThe Cleveland Clinic advises contacting a healthcare provider if a person has not had a period by age 16, has not had a period for three months or longer, experiences sudden changes in bleeding duration or volume, has severe pain during a period, experiences bleeding between periods, feels sick after using tampons, suspects pregnancy, or if a period has not returned within three months of stopping birth control pills.
The menstrual cycle | Better Health Channel betterhealth.vic.gov.au 5 facts
claimDuring the luteal phase, the egg travels through the fallopian tubes to the uterus, and the uterine lining continues to thicken in preparation for pregnancy.
claimIf pregnancy does not occur during the luteal phase, the individual will have a period and the menstrual cycle will restart.
claimIf pregnancy occurs, menstruation does not happen; if pregnancy does not occur, menstruation happens and the menstrual cycle restarts.
claimThe likelihood of pregnancy is highest if unprotected sex occurs around the time of ovulation.
claimThe menstrual cycle is a series of changes the female body undergoes each month to prepare for potential pregnancy.
Female reproductive system en.wikipedia.org 5 facts
claimDuring menopause, menstruation ceases, the ovaries stop releasing eggs, and the uterus stops preparing for pregnancy.
claimIf an ovum is fertilized while in the fallopian tube, it normally implants in the endometrium upon reaching the uterus, signaling the beginning of pregnancy.
claimFactors such as pregnancy, diabetes, weakened immune systems, tight-fitting clothing, or douching can cause yeast infections.
claimThe vagina is referred to as the birth canal in the context of pregnancy.
claimThe human female reproductive system is immature at birth and develops at puberty to enable the release of matured ova from the ovaries, facilitate fertilization with sperm, and create a protective environment for a developing fetus during pregnancy.
Menstrual Cycle Phases: Decoding the Stages - Perelel perelelhealth.com Oct 22, 2024 4 facts
claimThe menstrual phase occurs on days 1–5 of the cycle, during which the uterine lining sheds if pregnancy did not occur, causing bleeding.
claimThe luteal phase occurs on Days 15–28 of the menstrual cycle, during which the uterus prepares for a possible pregnancy.
claimThe luteal phase is the second half of the menstrual cycle, occurring after ovulation, where the body prepares for a period if pregnancy has not occurred, often resulting in fatigue and PMS symptoms due to hormonal shifts.
claimIf pregnancy does not occur, estrogen and progesterone levels drop, causing the uterine lining to shed and triggering the menstrual period.
Understanding the Menstrual Cycle: A Breakdown of Its Four Phases raleighob.com Jan 15, 2025 4 facts
claimThe menstrual cycle is a series of physiological changes in the female body that prepares the uterus for a potential pregnancy.
claimIf an egg is fertilized and implants, the body produces human chorionic gonadotropin (hCG), which signals the corpus luteum to continue secreting progesterone to maintain the uterine lining and support early pregnancy.
claimDuring the luteal phase, the body secretes progesterone to prepare for potential pregnancy by maintaining the uterine lining.
claimDuring the follicular phase, the body prepares for potential pregnancy by producing and maturing eggs in the ovaries.
Extent and Health Consequences of Chronic Sleep Loss and ... - NCBI ncbi.nlm.nih.gov 4 facts
referenceLee KA, Zaffke ME, and Baratte-Beebe K investigated the role of folate and iron in restless legs syndrome and sleep disturbance during pregnancy in a 2001 study published in the Journal of Women’s Health and Gender-based Medicine.
referenceK.C. Schoendorf and J.L. Kiely identified a relationship between maternal smoking during and after pregnancy and Sudden Infant Death Syndrome (SIDS) in a 1992 study published in Pediatrics.
claimSudden infant death syndrome (SIDS) is related to maternal smoking during and after pregnancy.
claimRestless Legs Syndrome commonly occurs in individuals with iron deficiency, including those with end-stage renal disease, iron-deficiency anemia, pregnancy, and those who have undergone gastric surgery.
Female Reproductive Organ Anatomy: Overview, Gross ... emedicine.medscape.com Nov 27, 2024 4 facts
claimThe female reproductive system undergoes physiological changes throughout life stages from puberty to menopause and utilizes the hormone-regulated menstrual cycle to prepare the body for potential pregnancy.
claimThe uterus is a specialized muscular organ designed to support and sustain fetal development during pregnancy and to facilitate fetal expulsion during parturition through coordinated contractions.
claimThe body of the uterus holds a pregnancy, and uterine wall contractions help expel the fetus during labor and delivery.
measurementDuring pregnancy, ovaries more than double in size.
Female Reproductive System: Structure & Function my.clevelandclinic.org Nov 28, 2022 3 facts
claimThe uterus is a hollow, pear-shaped organ that holds a fetus during pregnancy and is divided into two parts: the cervix and the corpus.
claimMenstruation is the periodic shedding of the uterine lining when pregnancy does not occur during a cycle, often referred to as a period.
claimThe corpus is the larger portion of the uterus that expands during pregnancy.
Follicular Phase Of Menstrual Cycle - Cleveland Clinic my.clevelandclinic.org Aug 8, 2022 3 facts
claimThe highest chance of pregnancy occurs with intercourse during the five days leading up to ovulation and on the day of ovulation.
claimThe corpus luteum produces pregnancy hormones; if pregnancy does not occur, the corpus luteum disappears and the uterus lining is shed during menstruation.
claimThe likelihood of becoming pregnant is highest in the days surrounding ovulation, which includes the end of the follicular phase.
Stress: Its Negative Impact on Your Mental & Physical Health cwcare.net Jun 7, 2023 3 facts
claimChronic stress during pregnancy can harm the health of both the pregnant person and the baby.
claimUnderweight status or excessive weight gain during pregnancy increases the risk of complications such as premature delivery (delivery before 37 weeks) and gestational diabetes.
claimStress during pregnancy can exacerbate normal pregnancy discomforts and lead to serious health problems, including depression, eating issues, and high blood pressure.
Ethnobotanical study of food plants used in traditional medicine in ... link.springer.com Nov 26, 2025 3 facts
measurementAnaemia is the most frequently addressed condition treated with food plants in the Quitexe municipality (11.97% of citations), followed by cough and fatigue (7.04% each), diarrhoea (7.04%), diabetes and constipation (5.63% each), fever (4.23%), haemorrhoids (3.52%), yellow fever and bronchitis (2.82% each), and malaria, nausea during early pregnancy, flu, erectile dysfunction, and dysentery (2.11% each).
referenceEl Hajj and Holst (2020) reviewed literature regarding herbal medicine use during pregnancy, with a specific focus on Sub-Saharan Africa.
claimThe empirical use of Spondias dulcis and Aframomum alboviolaceum during pregnancy warrants caution due to a lack of robust scientific evidence regarding their safety.
Cycle Syncing: How to Understand Your Menstrual Cycle to Reduce ... healthmatters.nyp.org Aug 29, 2025 3 facts
claimFor individuals trying to conceive, taking a B complex vitamin is important as it helps reduce the risk of certain brain and neurological conditions in early pregnancy.
claimIf an egg is fertilized by sperm during the luteal phase, it may attach to the uterine lining to begin pregnancy.
claimIf pregnancy does not occur, estrogen and progesterone levels, which peak in the early part of the luteal phase, begin to drop, leading to the start of menstruation.
Causes of Inflammation and How It Affects Health chanzuckerberg.com Oct 13, 2022 3 facts
claimKelly Jurado, Dan Donegeun Huh, and Monica Mainigi are studying the impact of chronic inflammation on pregnancy.
claimThe study utilizing the "placenta-on-a-chip" model aims to provide insight into immunological mechanisms governing pregnancy, which is intended to assist in the diagnosis, prevention, and treatment of infertility and pregnancy complications.
claimWhile inflammation plays an essential role in pregnancy by providing immune protection, excessive inflammation can lead to negative consequences such as premature birth and preeclampsia.
Female reproductive organs: Anatomy and functions kenhub.com 3 facts
claimThe endometrial lining of the uterus proliferates each month to prepare for embryo implantation; if fertilization occurs, the uterus houses the fetus and placenta, but if pregnancy does not occur, the lining is shed during menstruation.
claimFemale reproductive organs undergo structural and functional changes monthly, which function to initiate pregnancy.
claimThe uterine cycle consists of three phases: menses, proliferative, and secretory, which act to prepare the uterus for potential fertilization and pregnancy.
Which hormones are present in men + women? - MITOcare mitocare.de 2 facts
claimDuring pregnancy, increasing concentrations of progesterone prepare the breast to produce milk, and human chorionic gonadotropin (hCG) performs pregnancy-preserving tasks.
claimThe pituitary gland in women releases follicle-stimulating hormone (FSH) and luteinizing hormone (LH) to prepare the body for pregnancy during the menstrual cycle.
how hormonal imbalance manifests differently in men and women healthmiro.com 2 facts
claimWomen experience significant hormonal changes during menstruation, pregnancy, and menopause, while men experience hormonal changes during andropause (male menopause).
claimWomen experience significant hormonal fluctuations due to the cyclical nature of their reproductive system, particularly during menstruation, pregnancy, and menopause.
A Comprehensive Review on the Therapeutic Properties of ... traditionalmedicine.actabotanica.org 2 facts
4 phases of the menstrual cycle: How to feel your best around your ... healthy.kaiserpermanente.org Jul 27, 2025 2 facts
claimThe ovulation phase occurs approximately halfway through the menstrual cycle and lasts for 1 to 2 days, during which an ovary releases an egg, estrogen levels increase, and the likelihood of pregnancy increases.
claimThe luteal phase occurs for approximately 2 weeks following ovulation, during which progesterone levels rise; if pregnancy does not occur, hormone levels drop, which may trigger premenstrual syndrome (PMS) symptoms.
The Menstrual Cycle | Patient Education - UCSF Health ucsfhealth.org 2 facts
measurementIf no pregnancy develops, the endometrium is shed as a menstrual period approximately fourteen days after ovulation.
measurementIf pregnancy occurs, the corpus luteum produces progesterone until approximately 10 weeks of gestation.
Men and Women: Different to the Bone - El Camino Health elcaminohealth.org 1 fact
claimLigaments relax during pregnancy to prepare the body for childbirth, which can make women more prone to ligament injuries because the joints are held less securely.
Evolutionary psychology - Wikipedia en.wikipedia.org 1 fact
claimMargie Profet hypothesized that morning sickness and food aversions during pregnancy function to prevent the ingestion of toxins that could harm a fetus, while remaining harmless to healthy non-pregnant women.
Sleep Across the Lifespan: A Neurobehavioral Perspective link.springer.com Feb 5, 2025 1 fact
measurementPregnancy, childbirth, and the postpartum period are associated with significant sleep disruption, with up to 78% of women reporting sleep disturbances during the third trimester of pregnancy.
The Menstrual Cycle: How It Changes as You Age | Mount Sinai Today health.mountsinai.org Jun 30, 2022 1 fact
procedureThe menstrual cycle proceeds in five steps: (1) The pituitary gland produces FSH, which signals the ovaries to produce estrogen. (2) When estrogen reaches a specific level for a set duration, the pituitary gland produces LH. (3) LH triggers ovulation, causing the ovary to release an egg into the fallopian tube. (4) The ovary produces progesterone to prepare the uterus for pregnancy. (5) If conception does not occur, hormone levels drop, the menstrual lining stops developing, and the lining is shed as a menstrual period.
How many hours of sleep are enough for good health? - Mayo Clinic mayoclinic.org 1 fact
claimPregnancy can result in poor sleep quality due to changes in hormone levels and physical discomfort.
The Evolutionary Impact of Dietary Shifts on Physical and Cognitive ... ouci.dntb.gov.ua 1 fact
referenceXie et al. (J. Nutr., 2008) reported that genetic variants of the FADS1 and FADS2 gene cluster are associated with altered (n-6) and (n-3) essential fatty acids in plasma and erythrocyte phospholipids in women during pregnancy and in breast milk during lactation.
The Good, The Bad and the Ugly of Inflammation medschool.vanderbilt.edu Feb 10, 2015 1 fact
claimAnimal and human studies suggest that maternal immune activation in response to infection during pregnancy can alter fetal brain development, which increases the risk for schizophrenia and autism in the offspring.
Battle of the Brain: Men Vs. Women [Infographic] nm.org 1 fact
claimGrey matter decreases during pregnancy, which contributes to the phenomenon known as 'pregnancy brain.'
The Bio-Social, Cultural Context of Family and Community iecmhc.org 1 fact
claimCultural beliefs and practices related to family relationships, pregnancy, prenatal care, and birth influence an expectant family's anticipation and experience of the coming child, as well as the development of the infant.
How Much Sleep Do You Need? - Sleep Foundation sleepfoundation.org Jul 11, 2025 1 fact
claimThe Sleep Foundation suggests that individuals can assess their personal sleep needs by evaluating factors such as daily productivity, daytime alertness, health status, medication use, physical activity levels, safety requirements for daily tasks, history of sleep disorders, caffeine dependency, sleep patterns during open schedules, and pregnancy or breastfeeding status.
Female Sexual Response & Hormone Control | SEER Training training.seer.cancer.gov 1 fact
claimA woman can become pregnant without experiencing an orgasm.
A Comparison of the Female vs Male Hormonal Cycle: Spoiler Alert ... tabooau.co Sep 24, 2021 1 fact
claimDuring the luteal phase of the female menstrual cycle, the body prepares for the implantation of a fertilised egg. If pregnancy does not occur, progesterone and oestrogen levels drop after their peak, which can trigger premenstrual syndrome (PMS) symptoms such as irritability and tiredness around days 22-24 of the cycle.
(PDF) The Role of Nutrition in Children's Growth and ... academia.edu 1 fact
claimBetter nutrition is linked to improved health outcomes for babies, children, and mothers, as well as a strengthened immune system during pregnancy and childbirth.
Understanding the Difference Between Men & Women Hormones prestonspharmacy.com Jan 13, 2026 1 fact
claimIn women, progesterone plays a crucial role in the second half of the menstrual cycle and during pregnancy.
Systems and organs | Anatomy and Physiology | Research Starters ebsco.com 1 fact
claimThe placenta, which is the part of the uterus that nourishes the fetus, produces hormones during pregnancy that prepare the body for childbirth and breastfeeding.
Parts of the Immune System | Children's Hospital of Philadelphia chop.edu 1 fact
claimIgG antibodies circulate in the spaces between tissues and are shared across the placenta during pregnancy.
Chronic inflammation in the etiology of disease across the life span nature.com Dec 5, 2019 1 fact
claimMulticenter systems analysis of human blood reveals the presence of immature neutrophils in males and during pregnancy, according to a 2017 study by Blazkova et al.
History of modern nutrition science—implications for current ... bmj.com Jun 13, 2018 1 fact
procedureThe World Health Organization (WHO) recommended widespread micronutrient supplementation during pregnancy (specifically iron and vitamin A) and the fortification of salt with iodine to prevent goitre, congenital hypothyroidism, and hearing loss.
Unknown source 1 fact
claimCorpus luteum function declines by the end of the luteal phase unless human chorionic gonadotropin (hCG) is produced due to pregnancy.
Sex differences in respiratory and circulatory cost during hypoxic ... nature.com Jul 2, 2019 1 fact
claimL. G. Moore, R. E. McCullough, and J. V. Weil found an increased hypoxic ventilatory response (HVR) in pregnancy, which they linked to hormonal and metabolic changes, in a 1987 study published in the Journal of Applied Physiology.
The Importance of Nutrition in Early Childhood Development novakdjokovicfoundation.org Sep 11, 2016 1 fact
claimUnder-nutrition during pregnancy stunts fetal growth and can lead to poor brain development resulting in irreversible chronic illnesses.
Physiology, Sleep Stages - StatPearls - NCBI Bookshelf - NIH ncbi.nlm.nih.gov 1 fact
claimDaytime sleepiness increases during pregnancy and the first few months postpartum.
Chronic Inflammation: How to Test For it and Prevent it medichecks.com Jan 31, 2024 1 fact
claimChronic low-grade inflammation is often caused by unhealthy lifestyle and behavior factors, including poor diet, alcohol consumption, pregnancy, sedentary behavior, stress, smoking, and weight gain.
Sleep by the Numbers - National Sleep Foundation thensf.org May 12, 2021 1 fact
claimWomen may experience more disrupted sleep due to hormonal changes associated with the menstrual cycle, pregnancy, and menopause, or due to conditions such as depression and fibromyalgia.