Question

In human female, ovulation occurs during menstrual cycle

• A. Just before the end of secretory phase
• B. At the end of proliferative phase
• C. In the beginning of proliferative phase
• D. In the middle of secretory phase

Answer 1

The correct option is B At the end of proliferative phase

Menstrual cycle
The cyclic changes that occur in the ovaries and the lining of the uterus in the female reproductive system of primates are called the menstrual cycle. Examples include humans, monkeys, etc.

Phases of the menstrual cycle
The menstrual cycle consists of three phases as follows:
1)Menstrual /bleeding phase
2)Follicular or proliferative phase
3)Luteal or secretory phase

Follicular phase
The follicular or proliferative phase lasts for about 7 - 8 days.
1)In this phase the follicular cells mature and give rise to the Graffian follicle.
2)Endometrium becomes thicker by rapid cell multiplication, an increase of uterine glands, and blood vessels.
3)Rapid secretion of LH leading to its maximum level during the mid-cycle called LH surge.
4)It induces rupture of the Graffian follicle and thereby the release of the ovum (ovulation). This usually happens on the 14th day.

Final answer
(A) At the end of the proliferative phase