Roughly what percentage of ovarian follicles undergo atresia (die) rather than reaching ovulation?

1. Folliculogenesis takes many follicles through primordial, primary, secondary, and tertiary stages. 2. Only one follicle typically survives to ovulate in a given cycle, out of the many that begin developing. 3. Roughly 99 percent of follicles instead undergo atresia (death), at any stage of development. 4. About 10 percent and About 50 percent are both different figures a reader might guess from memory, but neither matches the specific figure given here. 5. About 75 percent is also incorrect for the same reason: it does not match the specific figure given here. 6. So 99 percent is correct, far higher than the other listed values. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 27 "The Reproductive System", p.1296 §Folliculogenesis_