A human female has the maximum number of primary oocytes in her ovaries
a)	At birth	b)	Just prior to puberty
c)	Early in her fertile years	d)	Midway through her fertile years

(a)

No more oogonia are formed and added after birth. Oogonia (egg mother cells) divide by mitosis forming primary oocyte. Each primary oocyte then gets surrounded by a layer of granulosa cell called primary follicle. A larger number of these follicles degenerate during the phase from birth to puberty. Therefore, at maturity only 60,000-80,000 primary follicles are left in each ovary