OOgenesis Flashcards
OOgenesis
Production of ova in ovaries involving maturation and meiosis
Before birth
OOgonium undergoes meiosis 1 stopping at prophase 1
After Birth
OOgonium undergoes growth phase forming into primary oocyte
Primary OOcyte
encapsulated by number of cells forming primary follicle.
During growth/mature of follicle primary oocyte finishes the first meiotic division producing secondary oocyte and polar body
Secondary Oocyte
undergoes meiosis 2 stopping at metaphase 2 starting ovulation
Ovulation
Follicle ruptures releasing secondary OOcyte and polar body
If penetration occurs meiosis II continues producing a OOtid
f no penetration occurs secondary oocyte is released during menstruation
Ootid
Must under go maturation to become mature ovum