After ovulation,the ruptured Graafian follicle transforms into which structure?

How many chromosomes are present in an unfertilized egg?

When does the reduction division occur during the process of gametogenesis?

Identify the hormone that acts on the cells required for the nourishment of sperm and stimulates them.

In mammals,growing oocytes are surrounded by special nutritive cells called:

In human females,at the time of birth,there are approximately $2$ million primary oocytes. How many of them normally reach maturity during the entire reproductive life of a female?