menstrual period ↔ pregnancy

Relations (1)

related 2.32 — strongly supporting 4 facts

The menstrual period is the physiological result of the uterine lining shedding when pregnancy does not occur [1], [2], and [3]. The hormonal fluctuations that regulate the menstrual cycle are directly influenced by whether or not a pregnancy develops [1], [2].

Facts (4)

Sources

The Menstrual Cycle: How It Changes as You Age | Mount Sinai Today health.mountsinai.org Mount Sinai 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.

4 Phases of Menstrual Cycle: Hormone Changes Chart - Liv Hospital int.livhospital.com Liv Hospital 1 fact

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.

Menstrual Cycle Phases: Decoding the Stages - Perelel perelelhealth.com Perelel 1 fact

claimIf pregnancy does not occur, estrogen and progesterone levels drop, causing the uterine lining to shed and triggering the menstrual period.

The Menstrual Cycle | Patient Education - UCSF Health ucsfhealth.org UCSF Health 1 fact

measurementIf no pregnancy develops, the endometrium is shed as a menstrual period approximately fourteen days after ovulation.