Ovarian cycle,”During first week, several primary oocytes begin to develop, each within a follicle- By second week, only 1 follicle and its primary oocyte continue developing- Primary oocyte undergoes meiosis to become secondary oocyte- Secondary oocyte surrounded by cumulus mass, which secretes estradiol- At ovulation, follicle ruptures releasing egg, zona pellucida
and cumulus mass”