<P> The creation of oogonia traditionally doesn't belong to oogenesis proper, but, instead, to the common process of gametogenesis, which, in the female human, begins with the processes of folliculogenesis, oocytogenesis, and ootidogenesis . </P> <P> Oogenesis starts with the process of developing oogonia, which occurs via the transformation of primordial follicles into primary oocytes, a process called oocytogenesis . Oocytogenesis is complete either before or shortly after birth . </P> <P> It is commonly believed that, when oocytogenesis is complete, no additional primary oocytes are created, in contrast to the male process of spermatogenesis, where gametocytes are continuously created . In other words, primary oocytes reach their maximum development at ~ 20 weeks of gestational age, when approximately seven million primary oocytes have been created; however, at birth, this number has already been reduced to approximately 1 - 2 million . </P> <P> Recently, however, two publications have challenged the belief that a finite number of oocytes are set around the time of birth . The renewal of ovarian follicles from germline stem cells (originating from bone marrow and peripheral blood) has been reported in the postnatal mouse ovary . In contrast, DNA clock measurements do not indicate ongoing oogenesis during human females' lifetimes . Thus, further experiments are required to determine the true dynamics of small follicle formation . </P>

When do females produce all of their oocytes which will develop into eggs