Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
• Menstrual Cycle • A repeating series of changes in the lining of the uterus or ENDOMETRIUM in preparation of uterus receiving a fertilized egg is called the MENSTRUAL CYCLE • the menstrual cycle begins at puberty & lasts 30-40 years until MENOPAUSE when hormones change & egg production stops • this cycle repeats “APPROXIMATELY” every 28 days • 3 Phases of the Menstrual Cycle 1. Menses 2. Proliferative stage 3. Secretory Phase Secretory Phase Menses Proliferative Phase • MENSES • begins with the shedding of the lining of the uterus • tissue, cells, blood, etc., are passed from uterus to outside of body • this phase lasts an “AVERAGE” of 5 days • PROLIFERATIVE PHASE • as MENSES ends the uterus is repaired and prepared for receiving another egg • ovulation occurs around day 14 and the egg begins its journey to the uterus • the hormones FSH & LH play a large role in when and how this happens • SECRETORY PHASE • lasts from day 15 to 28 (APPROXIMATELY) • phase is named for the CORPUS LUTEUM which produces ESTROGEN & PROGESTERONE • if the egg is not fertilized (NO PREGNANCY) the hypothalamus signals to stop producing FSH & LH • as hormone levels drop the lining of the uterus begins to shed & the cycle starts again