Ukuze siqonde le nkinga enzima, ake sibheke ukuzalwa kwengane ngezinsuku.
Inqubo yokuzalwa kwengane
Umklamo uyakwenzeka emva kokuqala kwe-ovulation, okuyinto, njengombuso, eyenzeka phakathi nomjikelezo wokuya esikhathini. Iqanda elivuthiwe lishiya i-ovary bese liqala ukunyakaza kwalo emgqonyeni we-fallopian. Umanyolo ungaba phakathi kwezinsuku ezintathu kuya kwezingama-7 emva kwe-ovulation. Uma phakathi nalesi sikhathi ubulili buba khona, i-spermatozoa emva kwe-ejaculation yamahora amaningana iqala ukuhamba endleleni yokulala yesifazane eya eqanda. Ukuze ukukhulelwa kwenzeke, akudingeki nje ukuba afinyelele ovumeni, kodwa futhi kumele anqobe igobolondo lalo.
Kusukela ukungena nokuxhumeka kwe-spermatozoon neqanda, usuku lokuqala lokukhulelwa luqala. Amaseli abesilisa nabesifazane aguquka, enza i-zygote yamahora ayishumi nambili-i-embroidery e-unicellular, esivele inezo zonke izakhi zofuzo ezimelelwe i-chromosomes kabili kubazali.
Ukubeletha kwengane esibelethweni kuhambisana nokuthuthukiswa kwe-zygote kwisibeletho. Le nqubo iqala kusukela ngosuku lwesithathu kuya kwesishiyagalolunye. Njengoba i-tube fallopian ihlanganiswe ne-cilia ekhethekile, lokhu kusiza ukunyakaza kwe-zygote.
Ngesikhathi esifanayo nalokhu, ngokushesha ngemva kokukhulelwa, i-blastogenesis iqala - umbungu uqala ukwahlukanisa. Ngenxa yalokho, kusuka embumbeni unicellular iba multicellular (morula).
Cishe ngosuku lwesikhombisa, lizophinde lishintshe isakhiwo sayo, kancane kancane lishintshe libe yi-blastocyst - isimo esimnandi sokungeniswa okuphumelelayo ku-endometrium kwesibeletho.
Ukufakelwa ngaphakathi ku-uterine mucosa kuyisiqalo sokuthuthukiswa kokuqhubeka
Ekupheleni kweviki lesibili, izakhi zangaphakathi ziqala. Futhi ngosuku lweshumi nesithupha luqala isikhathi sesibili ekuthuthukiseni kwekusasa lomntwana .
Ngemva kokuhlola izigaba eziyinhloko zokuzalwa kwengane, kungase kuqinisekiswe ngokuqiniseka ukuthi ukuvela kwempilo emisha kuyisimangaliso ukuthi asisoze sayeka ukumangala.