Question

Ovulation occurs under the influence of

• A. Progesterone
• B. Estrogens
• C. FSH
• D. LH

Answer 1

The correct option is D LH

Ovulation refers to rupture of mature Graafian follicle and release of an ovum in body cavity on 14${}^{th}$ day of 28 days menstrual cycle. FSH is secreted by anterior pituitary gland. It stimulates growth, development and hormonal secretion of Graafian follicle and ovum maturation.

LH is also secreted by anterior pituitary which inhibits secretion of FSH, stimulate rupture of Graafian follicle and release of the ovum. LH also stimulates the formation of corpus luteum from ovulated Graafian follicle which in turn secretes estrogens and progesterone.

Progesterone and estrogens exert negative feedback control over the anterior pituitary’s secretion of LH and cause degeneration of corpus luteum in the ovary.