Changes in $GnRH$ pulse frequency in femail is controlled by circulating levels of
progesterone only
progesterone and inhibin
estrogen and progesterone
estrogen and inhibin.
In woman cessation of menstruation occurs at the age of
Corpus luteum is the source of secretion of
If after ovulation no pregnancy results, the corpus luteum
During menstruation the level of progesterone in blood is