INNERSPACE IMAGING / SCIENCE PHOTO LIBRARY INNERSPACE IMAGING / SCIENCE PHOTO LIBRARY
Foetal ovary. Light micrograph of a section through a foetal ovary. The ovary contains primordial follices (cysts), which form between the fourth and seventh month of foetal development. Within each follice is a primary oocyte, or ovum (purple dot). Once sexual maturity is reached, up to 20 primordial follicles are activated to form a mature follice in every menstrual cycle. Only one will reach full maturity and be able to release its ovum (egg) at ovulation. Over a woman's lifetime, 99.9% of her eggs will be destroyed without having been released by a process called atresia. Mag: x430 when 10cm wide.
Model release not required. Property release not required.