Ovulation does not occur during pregnancy in the human female because
Assertion : Corpus luteum degenerates in the absence of fertilization.
Reason : Progesterone level decreases.
Changes in $GnRH$ pulse frequency in femail is controlled by circulating levels of
The placenta helps in the maintenance of pregnancy by secreting a hormone, known as
What are the changes in the oogonia during the transition of a primary follicle to Graafian follicle ?