~5e+6 at birth: ~5e+5 at menarche: ~25,000 at age 37: 1,000 at menopause %
||Human Homo sapiens
||George K, Kamath MS. Fertility and age. J Hum Reprod Sci. 2010 Sep3(3):121-3. Introduction, 1st paragraphPubMed ID21234171
||Faddy MJ, Gosden RG, Gougeon A, Richardson SJ, Nelson JF. Accelerated disappearance of ovarian follicles in mid-life: implications for forecasting menopause. Hum Reprod. 1992 Nov7(10):1342-6.PubMed ID1291557
||Menarche is the first menstrual cycle. The ability to procreate is age related, more so in the female partner. In the female fetus, germ cell proliferation comes to a standstill by around 20 weeks, resulting in women being born with a set number of primordial follicles. At birth, the female child is born with about 5 million primordial follicles which decrease to about 500,000 at menarche. With each subsequent menstrual cycle follicular atresia/apoptosis continues with the numbers decreasing to about 25,000 at the age of 37 and 1000 close to menopause.