<P> Synchronously with ootidogenesis, the ovarian follicle surrounding the ootid has developed from a primordial follicle to a preovulatory one . </P> <P> Both polar bodies disintegrate at the end of Meiosis II, leaving only the ootid, which then eventually undergoes maturation into a mature ovum . </P> <P> The function of forming polar bodies is to discard the extra haploid sets of chromosomes that have resulted as a consequence of meiosis . </P> <P> In vitro maturation (IVM) is the technique of letting ovarian follicles mature in vitro . It can potentially be performed before an IVF . In such cases, ovarian hyperstimulation isn't essential . Rather, oocytes can mature outside the body prior to IVF . Hence, no (or at least a lower dose of) gonadotropins have to be injected in the body . However, there still isn't enough evidence to prove the effectiveness and security of the technique . </P>

In what stage of oogenesis does ovulation occur