Fig. 1: The ovarian reserve in perimenopausal Chinese women.
From: Stem cell transplantation extends the reproductive life span of naturally aging cynomolgus monkeys

a Schematic illustration of the experimental design for follicle counting. b H&E-stained ovarian sections of a 36-year-old (y) woman showed the normal morphology of primordial, primary, secondary, and antral follicles (yellow arrows). Scale bars, 100 μm. c, d Bar graphs illustrated the number of primordial (c) and primary (d) follicles in the 35–52 y women’s ovaries. n = 5 (35–39 y), n = 5 (40–44 y), n = 11 (45–49 y), n = 5 (50–52 y). e H&E-stained ovarian sections of 43 y and 49 y women showed the morphology of secondary follicles. Scale bars, 100 μm. f Bar graph illustrated the number of secondary follicles in the ovaries of 35–52 y. n = 5 (35–39 y), n = 5 (40–44 y), n = 11 (45–49 y), n = 5 (50–52 y).