Knowledge Tree
menstruation
Also known as: period
Facts (64)
Sources
The Normal Menstrual Cycle and the Control of Ovulation - NCBI - NIH ncbi.nlm.nih.gov Aug 5, 2018 12 facts
claimWithin two days after the start of menstruation, estrogen produced by growing ovarian follicles stimulates the regeneration of the surface endometrial epithelium.
claimImmediately after menstruation, cervical mucous is scant and viscous due to low steroid hormone concentrations.
claimThe release of prostaglandins during menstruation may be caused by decreased stability of lysosomal membranes in endometrial cells.
claimMenstruation begins on cycle day 28 of the menstrual cycle.
measurementThe typical volume of blood lost during menstruation is approximately 30 mL, while any amount greater than 80 mL is considered abnormal.
procedureHistologic dating of the endometrium is most accurately performed via an endometrial biopsy conducted 2-3 days prior to expected menstruation.
claimThe release of prostaglandins during menstruation may be caused by decreased stability of lysosomal membranes in endometrial cells.
measurementThe typical volume of blood lost during menstruation is approximately 30 mL, and any amount greater than 80 mL is considered abnormal.
procedureHistologic dating of the endometrium is most accurately performed by conducting an endometrial biopsy 2-3 days prior to the expected onset of menstruation.
claimImmediately after menstruation, cervical mucous is scant and viscous.
claimWithin two days after the start of menstruation, estrogen produced by growing ovarian follicles stimulates the regeneration of the surface endometrial epithelium.
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.
Understanding the Phases of the Menstrual Cycle - Clue helloclue.com 6 facts
claimAnovulation is more common during the early years of menstruation (following menarche) and during perimenopause (the transition to menopause).
claimThe uterine cycle is divided into four phases: menstruation, the proliferative phase, ovulation, and the secretory phase (before period bleeding).
claimMenstruation is the phase of the uterine cycle where the uterine lining sheds.
claimMenstruation begins when progesterone and estrogen levels drop.
claimThe uterine cycle comprises four key phases: menstruation, the proliferative phase, ovulation, and the secretory phase.
claimMenstruation begins again when progesterone and estrogen levels drop.
Female Reproductive System: Structure & Function my.clevelandclinic.org Nov 28, 2022 6 facts
claimThe female reproductive system consists of internal and external organs that create hormones and facilitate fertility, menstruation, and sexual activity.
claimMenstruation is the periodic shedding of the uterine lining when pregnancy does not occur during a cycle, often referred to as a period.
claimThe number of eggs in a female's ovaries declines as the individual ages and menstruates each cycle.
claimThe female reproductive system facilitates sexual intercourse, reproduction, and menstruation.
claimThe female reproductive organs are involved in sexual activity, fertility, menstruation, and reproduction.
claimThe female reproductive system is responsible for creating hormones, fertility, menstruation, and sexual activity.
Female reproductive system en.wikipedia.org 4 facts
claimIf a fertilized egg does not embed in the wall of the uterus, the female begins menstruation.
claimDuring menopause, menstruation ceases, the ovaries stop releasing eggs, and the uterus stops preparing for pregnancy.
claimMenstruation is the process where the uterine lining is shed as blood, mucus, and tissue if fertilization does not occur.
claimIn the absence of fertilization, the ovum traverses the entire reproductive tract from the fallopian tube until exiting the vagina through menstruation.
Menstrual Cycle Phases: Decoding the Stages - Perelel perelelhealth.com Oct 22, 2024 3 facts
claimPassing large, painful clots during menstruation can be a sign of menorrhagia.
referenceThe U.S. Department of Health and Human Services, NICHD, and Eunice Kennedy Shriver National Institute of Child Health and Human Development provide information on menstruation and menstrual problems.
claimThe four phases of the menstrual cycle are menstruation, follicular, ovulation, and luteal.
Reproductive Hormones endocrine.org Jan 24, 2022 3 facts
claimThe corpus luteum breaks down if a woman does not become pregnant, which lowers progesterone levels and triggers menstruation.
claimEstrogen, testosterone, and progesterone are reproductive hormones responsible for sexuality, fertility, pregnancy, puberty, menstruation, menopause, sex drive, and sperm production.
claimHigh levels of dihydrotestosterone in women, stemming from excess testosterone production, can cause excess body and facial hair, adult acne, and menstruation issues.
Follicular Phase Of Menstrual Cycle - Cleveland Clinic my.clevelandclinic.org Aug 8, 2022 3 facts
claimThe corpus luteum produces pregnancy hormones; if pregnancy does not occur, the corpus luteum disappears and the uterus lining is shed during menstruation.
claimThe follicular phase begins on the first day of menstruation.
claimDuring menstruation, the uterus lining (endometrium) is shed through the vagina.
Female reproductive organs: Anatomy and functions kenhub.com 3 facts
claimThe vagina is the outermost internal female sex organ, extending from the uterus to the vulva, and functions to facilitate menstruation, sexual intercourse, and childbirth.
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.
claimThe ovaries function as endocrine glands by secreting hormones that are necessary for fertility, menstruation, and sexual maturation in females.
The menstrual cycle | Better Health Channel betterhealth.vic.gov.au 3 facts
measurementThe average length of a period (menstruation) is 3 to 7 days.
claimDuring menstruation, the uterus lining sheds and exits through the vagina, consisting of blood, mucus, and cells from the uterine lining.
claimIf pregnancy occurs, menstruation does not happen; if pregnancy does not occur, menstruation happens and the menstrual cycle restarts.
Understanding the Menstrual Cycle: A Breakdown of Its Four Phases raleighob.com Jan 15, 2025 3 facts
measurementThe follicular phase of the menstrual cycle typically occurs from day 1 to day 13, starting on the first day of menstruation and lasting until ovulation.
claimKeeping track of the menstrual cycle helps women predict the onset of menstruation and manage symptoms.
claimThe menstrual cycle consists of four phases: menstruation, the follicular phase, ovulation, and the luteal phase.
Menstrual Cycle (Normal Menstruation): Overview & Phases my.clevelandclinic.org Dec 9, 2022 3 facts
claimMenstruation, also known as menses or a period, is the monthly shedding of the uterine lining, consisting of blood and tissue that flows from the uterus through the cervix and out of the vagina.
claimCommon symptoms of menstruation include cramps (caused by the uterus contracting to release its lining), mood changes, trouble sleeping, headaches, food cravings, bloating, breast tenderness, and acne.
measurementThe average age for the start of menstruation is 12, though it can begin as early as 8 or as late as 16 years old, typically occurring within a few years of the development of breasts and pubic hair.
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.
All about the male hormone cycle | Guud Woman guudwoman.com 2 facts
claimWomen experience hormonal fluctuations related to their monthly cycle, which occur primarily just before menstruation.
claimMen generally do not notice their nocturnal hormone production, whereas women experience sleep disruptions due to hormonal fluctuations, such as the drop in estrogen levels after ovulation and before menstruation which causes body temperature to rise.
Female Reproductive Organ Anatomy: Overview, Gross ... emedicine.medscape.com Nov 27, 2024 2 facts
Phytochemical and Pharmacological Studies of Traditionally Used ... heraldopenaccess.us 1 fact
claimVitex Negundo modulates biological processes including apoptosis, cell cycle, sperm motility, polycystic ovary disease, and menstruation.
Female Sexual Response & Hormone Control | SEER Training training.seer.cancer.gov 1 fact
referenceThe uterine cycle occurs simultaneously with the ovarian cycle and consists of three phases: the menstrual phase (menstruation), the proliferative phase (repair of the endometrium), and the secretory phase (growth of glands and blood vessels).
The Menstrual Cycle: How It Changes as You Age | Mount Sinai Today health.mountsinai.org Jun 30, 2022 1 fact
claimIrregular menstruation after adolescence may be a sign of hormonal imbalances and warrants consultation with a doctor.
The role of Plant Foods in the evolution and Dispersal of early Humans kernsverlag.com Jul 30, 2022 1 fact
claimA long-term raw food diet has consequences for body weight and menstruation, as reported in the 1999 study 'Consequences of a Long-Term Raw Food Diet on Body Weight and Menstruation: Results of a Questionnaire Survey' published in Annals of Nutrition and Metabolism.
4 Phases of Menstrual Cycle: Hormone Changes Chart - Liv Hospital int.livhospital.com Mar 19, 2026 1 fact
claimLow hormone levels during menstruation can cause feelings of tiredness.
Which hormones are present in men + women? - MITOcare mitocare.de 1 fact
claimOestrogen is required to rebuild the lining of the uterus after menstruation and to support egg maturation.
Cycle Syncing: How to Understand Your Menstrual Cycle to Reduce ... healthmatters.nyp.org Aug 29, 2025 1 fact
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.
Physiology, Female Reproduction - StatPearls - NCBI Bookshelf ncbi.nlm.nih.gov Mar 20, 2024 1 fact
claimThe female reproductive system consists of internal and external organs that facilitate menstruation and procreation.
The Normal Menstrual Cycle and the Control of Ovulation - PubMed pubmed.ncbi.nlm.nih.gov Aug 5, 2018 1 fact
claimMenstruation is defined as the cyclic, orderly sloughing of the uterine lining, which occurs in response to hormonal interactions between the hypothalamus, pituitary gland, and ovaries.