Pofuna kumvetsa nkhani yovutayi, tiyeni tione kubadwa kwa mwana ndi masiku.
Kuchita kwa kubadwa kwa mwana
Mimba imakhala yotheka pambuyo pa kuyamba kwa ovulation, yomwe, monga lamulo, imapezeka pakati pa msambo. Dzira lokhwima limasiya mazira ndipo limayamba kuyendayenda mumatope. Feteleza ikhoza kuchitika patangotha masiku atatu mpaka 7 kuchokera pa ovulation. Ngati panthawiyi kugonana kumachitika, spermatozoa pambuyo pa kukakamizidwa kwa maola angapo amayamba kusunthira njira yachiwerewere yogonana kupita ku dzira. Kuti feteleza ichitike, safuna kuti afike pachimake, komanso kuti agonjetse chipolopolo chake.
Kuchokera polowera ndi kugwirizana kwa spermatozoon ndi dzira, tsiku loyamba la mimba limayamba. Maselo ammimba ndi azimayi amasinthasintha, kupanga zygote khumi ndi ziwiri - kamwana kamodzi kamodzi kamene kamakhala ndi mauthenga onse omwe amaimira ma chromosomes aŵiri kuchokera kwa makolo.
Kubadwanso kwa mwana m'mimba kumagwirizana ndi kupititsa kwa zygote ku chiberekero. Izi zikuchitika kuyambira pa 3 mpaka 9. Popeza kuti khola lamakono lili ndi cilia yapadera, izi zimathandiza kusintha zygote.
Panthawi imodzimodziyo, patangotha feteleza, blastogenesis imayamba - kamwana kamayamba kugawa. Chotsatira chake, kuchokera mu mimba yosungira mazira imakhala ma multicellular (morula).
Pafupifupi tsiku lachisanu ndi chiwiri, lidzasinthiranso kayendedwe kake, pang'onopang'ono kusinthira kukhala blastocyst - ndibwino kuti zitheke kulowera ku endometrium ya chiberekero.
Kuyika mu uterine mucosa ndi chiyambi cha chitukuko chopitirira
Kumapeto kwa sabata lachiwiri, ziwalo zamkati zimayamba. Ndipo tsiku lakhumi ndi sikisitini likuyamba nthawi yachiwiri pakulera mwana wamtsogolo .
Pambuyo pofufuza miyeso yayikulu ya kubadwa kwa mwana, zikhoza kukhala motsimikiza kuti kutulukira kwa moyo watsopano ndi chozizwitsa kuti sitidzatha kudabwa.