In human females at the time of birth there are two million ova: how many of them normally reach maturity in the course of normal reproductive life

External stimulus which induces cleavage in an unfertilized ovum is called

The only human system that is derived from all the three germ layers is

A boy who has not passed through puberty sustains an injury to his anterior pituitary such that $FSH$ is no longer released, but $LH$ secretion is normal. After he grows to maturity, one would expect that he would

The corpus luteum secretes ……..