In mammals,the female secondary sexual characters are developed by the hormone:

How many eggs do you think were released by the ovary of a female dog which gave birth to $6$ puppies?

What are the diploid cells in gametogenesis?

Spermatogonia undergo a series of cell divisions to produce sperms. Select the correct statements from the following:
$A$. Spermatogonia always undergo meiotic cell division.
$B$. Primary spermatocytes divide mitotically to produce secondary spermatocytes.
$C$. Secondary spermatocytes, through their second meiotic division, produce spermatids.
$D$. Spermatids produce spermatozoa through mitosis.
$E$. Spermatids transform into spermatozoa by spermiogenesis.
Choose the correct answer from the options given below:

In a $30$-year-old woman,in what form is the ovum released?

The growing ovarian follicles mainly secrete a hormone named?