FIG. 4.

Quantitative analysis of ovarian follicles in peripubertal and 1-yr-old mice. The left ovaries of 6-wk-old (A) and 1-yr-old (B) mice of the indicated genotypes were serially sectioned, and all follicles from every fifth (1-yr-old) or seventh (6-wk-old) section were counted, categorized as primordial, primary, secondary, or antral, and scored as either healthy or atretic. Data represent raw follicle count numbers and were not adjusted to estimate the total ovarian follicle population; n = 5–6 ovaries per genotype. All data are expressed as means ± SEM (columns and error bars).