Formation of oogonia in human females is completed in . . . . . . .

During coitus,the human male ejaculates about ...... number of sperms.

The testes of a great majority of mammals are typically enclosed in an extra-abdominal sac,the scrotum. The temperature inside the scrotum is lower than that in the abdomen. What will happen if the temperature of the scrotum is artificially maintained at the level of abdominal temperature?

At puberty,how many primary follicles are left in each ovary?

The following figure is a schematic representation of oogenesis. Which cells are $P$ and $Q$?
$\quad\quad\quad P\quad\quad\quad Q$

Mammalian eggs have