Ref : 013312-83 - © Alain GOUGEON- ISM

Follicle with antrum (diameter: 740 µm). Note that the cumulus oophorus, massive granulosa cells surrounding the oocyte, is now clearly visible. If it does not enter in atresia, this follicle will ovulate in about 40 days. Histological section of a human ovary, light micrograph, hematoxylin stain.