Ovulation in human female normally takes place during menstrual cycle.

Correct Option: D

Explanation:

• From the 7th day onward till the 14th day it is considered the proliferative phase. 

• Here follicles development occurs.

• Ovulation occurs at the end of the proliferative phase.

• On ovulation, the egg is released, and LH surge is maximum.

• When the egg is not fertilized, the corpus luteum degenerates and becomes corpus albican. This phase is the secretory phase.

• After 14days of ovulation again the menses occurs and the cycle is repeated.

Hence, ovulation occurs at the end of the proliferative phase.