Antrum is the cavity of

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

At what stage in a human female are the maximum number of primary follicles present in her ovaries?

For normal fertility,at least ....... of the sperm in a human ejaculate must have normal shape and size,and at least ...... of them must show vigorous motility.

The tertiary egg membrane is:

The process of gametogenesis is the formation of which of the following?