i. What is the period of menstruation? ii. On which day does ovulation occur during menstrual cycle?

Question

Observe the diagram of menstrual cycle and answer the following questions:

Menstrual cycle

i. What is the period of menstruation?

ii. On which day does ovulation occur during menstrual cycle?

iii. During which period is corpus luteum active during menstrual cycle? Which hormones are secreted by corpus luteum ?

iv. In menstrual cycle which reproductive organs undergo changes?

v. Which period is said to be period of regeneration of endometrium?

vi. Which period is said to be period of secretions of glands in endometrium?

Answer 1

i. 1 to 5 days is the period of menstruation.

ii. Ovulation occurs on 14th or 15th day.

iii. Corpus luteum is active till the 28th day of menstrual cycle. During this time if there is no union of sperm and ovum, then corpus luteum degenerates. Corpus luteum secretes estrogen and progesterone.

iv. Ovary and uterus undergo changes during menstrual cycle.

v. In menstrual cycle, days 5 to 14 are period of regeneration of endometrium.

vi. Period of secretions of glands in endometrium is 15 to 28 days.