the menstrual cycle - bedford public schools

of the follicle (fertile) empty follicle transforms into the corpus luteum?Stage 4 - Egg travels through fallopian tube (7 days) if not fertilized upon arrival in uterus the corpus luteum shrinks triggering menstruation and ripening of new egg.Changes in Ovarian Hormones:?Estrogen -gradually increases during days 1-14; signals body to thicken the lining of the uterus. Levels drop sharply after ovulation.?Progesterone -Levels remain low during the first half of the cycle and then increase sharplyduring the second half of the cycle. Maintaining the growth of the endometrium lining.Changes in the Uterus:Stage 1- Day 1-5 menstruationStage 2 Day 5- 13 pre-ovulatory stageStage 3 Day 14 OvulationStage 4 Day 15-28 post-ovulatory stageThe uterine lining slowly thickens from day 5 through day 28