Explain the ovarian and uterine events that occur during a menstrual cycle in a human female, under the influence of Pituitary and Ovarian hormones respectively.

Explain the ovarian and uterine events that occur during a menstrual c

1.	Explain the ovarian and uterine events that occur during a menstrual cycle in a human female, under the influence of Pituitary and Ovarian hormones respectively.
Answer» Release of gonodotropins (FSH and LH) from pituitary, during follicular phase or 5- 14 days of menstrual cycle leads to growth of primary follicle to Graafian follicle (GF.) in the ovary. estrogen from growing follicle helps proliferation of uterine endometrium or its repair. High level of LH at middle 14th day of the menstrual cycle leads to rapture of GF causing release of ovum. This is called ovulation. The remaining cells of GF transform into corpus luteum (CL) under the influence of LH. CL secretes progesterone that maintains endometrium in preparation for pregnancy. Level of FSH and LH fall due to rise of progesterone and estrogen (25th day of the cycle), leading to degeneration of CL. Level of progesteron falls, leading to disintegration of uterine endometrium and menstruation starts (0-5 day of the cycle).