Total number of Primordial follicles present at bih:

Primordial cells stas to form at 8 weeks of intrauterine life At 20 weeks they are around 6 - 7million At bih they are 1-2 million At pubey they are around 3 to 4 lakhs. A woman typically uses around 400-450 of these follicles in her life and the remaining undergo atresia. * Ovulation stas 12 years onward until 50 years mostly. Thats 38 years of menses. Hence 38 x 12 months = 456 follicles are totally utilized n a woman's life.