The number of primordial follicles that will give rise to mature eggs decreases dramatically from embryonic development until puberty. The 500,000 primordial follicles that reach a woman's adulthood constitute her ovarian reserve, which will also diminish with age as she goes through her menstrual cycles.
Number of follicles in the female before birth to puberty
By Concha Leal Cariñena (gynecologist), Marta Barranquero Gómez (embryologist) and Zaira Salvador BSc, MSc (embryologist).
Last Update: 06/08/2021