Figure 1. Schematic representation of ovarian embryonic
development. A, Cross-section through the dorsal part of a 13-mm human
embryo; B, sequential changes in the gonadal ridge, which is covered by
modified celomic epithelium (shaded). This epithelium
proliferates and forms cords that penetrate into the ovarian cortex and
give rise to the granulosa cells in the primordial follicles. The
follicles become separated from the overlying ovarian surface
epithelium (OSE) by stroma. The Mullerian ducts (Mul. duct) develop as
invaginations of the celomic epithelium dorsolaterally from the gonadal
ridges.
