B.Primary folliclesFSHI①ThePrimaryoocyte:become larger②Follicular cell (granulosa cell) :Primordialflattened*cuboidalcellsfolliclessimplelayerseveral layerFollicularcells③ZonapellucidaGranulosalayerappearsBasementGranulosacellsmembraneZona(acidophilic)pellucidaPrimaryOocytefolliclesOocyte
B. Primary follicles FSH / ① The Primary oocyte : become larger ② Follicular cell (granulosa cell) : flattened cuboidal cells simple layer several layer ③ Zona pellucida appears (acidophilic)
C.Secondary folliGranulosacellsAntrumDFolliclularantrumCoronaliquorfolliculiradiatathe cumulus oophorus :OocyteCumulusoophoruscorona radiatatheca folliculiThecatheca interna :richincapilaries+morecells(steroid-secreting cell)aromataseAndrostenedioneestrogen(granulosa cell)theca externa:lesscells&morefiber
C. Secondary follicle ① Folliclular antrum liquor folliculi ② the cumulus oophorus : corona radiata ③ theca folliculi theca interna : rich in capilaries+ more cells (steroid-secreting cell) aromatase Androstenedione estrogen (granulosa cell) theca externa: less cells & more fiber
oocyte grow up(D=125-150um)GranulosaThecaThecaAntrumlayerinternaexternaBasementmembraneV
oocyte grow up (D=125-150um)
D. Mature follicleD-1-2.5cmprotrude from the surface of the ovaryfolliclar antrum enlargegranulosa layer becomes thinner
D. Mature follicles protrude from the surface of the ovary D= 1-2.5 cm folliclar antrum enlarge granulosa layer becomes thinner
Primary oocyteOogoniumMeiosis Imitosisfetal periodSecondary oocyte(Shortlybeforeovulation）Primary oocyteMeiosis IImeiosis 1puberty(Stopatmetaphase)Secondaryoocytefertilizationmeidsis 2(lt is ready to ovulation)MatureovumPolarbodies(22 +X)(22 + X)
Primary oocyte Secondary oocyte Meiosis Ⅰ (Shortly before ovulation ) Meiosis Ⅱ (Stop at metaphase) (It is ready to ovulation)