Figure 1.

Absolute follicle counts in Amh^+/+ and Amh^−/− mice at 100–120 days of age. Primordial (A), transitioning (B) and primary follicles (C) were counted in single ovaries per mouse. Secondary (D), small antral (E), medium antral (F) and large antral follicles (G) were counted across both ovaries. Data are expressed as mean ± SEM and data were analysed by Student’s t-test (A, D, F, G) unless the assumptions were not met, in which case Mann–Whitney U tests were used (B, C, E). Amh^+/+ mice n = 8, Amh^−/− mice n = 10. AMH, anti-Müllerian hormone.