Isayensi yezonyango Imodeli yokwakheka kokukhulelwa kosana olusandul’ ukuzalwa Inkqubo yophuhliso Iseti ye-Embryo eneziqwenga ezili-10 Imodeli yesibhedlele selabhoratri

Iimodeli ezili-10 zimiselwe ukubonisa ubudlelwane phakathi kwenkqubo yophuhliso lwe-fetus kunye ne-uterus ngo-Okthobha wokukhulelwa. Iqanda libizwa ngokuba likhulelwe okanye lichumisiwe kwiiveki ezi-2 emva kokuchumisa; Iiveki ezi-3-8 emva kokuchumisa zibizwa ngokuba zii-embryos; Ukususela ekupheleni kweveki yesi-8, libizwa ngokuba yi-fetus; Iiveki ezi-8; I-embryo imalunga ne-3cm ubude kwaye iqalile ukuthatha imo yomntu, inentloko enkulu kakhulu, amehlo abonakalayo, iindlebe, impumlo nomlomo. Ukwakheka kwentliziyo kwasekuqaleni kunye nokuphefumla kunokubonwa ngovavanyo lwe-ultrasound. Kwiiveki ezili-12, i-fetus ingama-7 ~ 9cm ubude kwaye inobunzima obungama-20g. I-orthogonia yangaphandle yenzekile, kukho umsebenzi obuthathaka kwimilenze, kwaye amaziko okuqina avele kumathambo amaninzi. Kwiiveki ezili-16, i-fetus imalunga ne-10 ukuya kwi-17cm ubude kwaye inobunzima obungama-100 ukuya kwi-120g. Inesikhumba esibomvu, esigudileyo nesicacileyo esinobuninzi obuncinci beenwele ze-vellus. Uphuhliso oluthe kratya lwamathambo, uvavanyo lwe-X-ray lunokubona isithunzi samathambo, i-straightener yangaphandle inokwahlula indoda nebhinqa. Ukuhlolwa kwesisu kunokuva isandi sentliziyo yomntwana ongekazalwa, abafazi abakhulelweyo banokuziva intshukumo yomntwana ongekazalwa. Kwiiveki ezingama-20, umntwana ongekazalwa ufikelela kwi-18 ~ 27cm ubude, ubunzima buyi-280 ~ 300g, ulusu lubomvu bumnyama, ukukhanya kuyancipha, umzimba unamafutha e-fetus, intloko yomntwana ithatha i-1/3 yomzimba, kukho ukukhula kweenwele, kwaye umsebenzi wokuginya uqala. Kwiiveki ezingama-24 ubude bomzimba womntwana buyi-28 ~ 34cm, ubunzima buyi-600 ~ 700g, amafutha angaphantsi komhlaba aqala ukuqokelela, imibimbi yolusu. Kwiiveki ezingama-28, umntwana ongekazalwa ufikelela kwi-35 ~ 38cm ubude kwaye ubunzima buyi-100 ~ 1200g. Umzimba wonke ubhityile, ulusu lubomvu, kukho amafutha e-fetus emnweni (kwinzwane) uzipho alufikeleli ekupheleni komunwe (kwinzwane). Kwabasetyhini, i-labia majora iqulethe i-labia minora kunye ne-clitoris, kwaye kumadoda, amasende ehle aye kwi-scrotum. Ngenxa yamafutha angaphantsi komhlaba amancinci, imibimbi yobuso, njengendoda endala. Ukuba zizalwe, zinokukhala, ziginye, kwaye zishukumise amalungu azo, kodwa zibuthathaka kwaye zifuna ukhathalelo olukhethekileyo ukuze ziphile. Imveku yeeveki ezingama-32 inobude obungama-40cm, inobunzima obuyi-1500 ~ 1700g, ulusu lubomvu bumnyama, uboya bobuso buwile, kwaye bunokuphila emva kokhathalelo olufanelekileyo. Kwiiveki ezingama-36, imveku inobude obungama-45 ~ 46cm kwaye inobunzima obungama-2500g. Amafutha angaphantsi kwesikhumba, imibimbi yobuso iyanyamalala, uzipho lweminwe (unyawo) lufikelele kumnwe (incam yenzwane). Emva kokuzalwa, ukukrwela nokuncancisa kunethuba elihle lokusinda. Imveku ivuthiwe kwiiveki ezingama-40, ubude bayo bungama-50cm kwaye ubunzima bayo bungama-3000 ~ 3300g. Ulusu lupinki, amafutha angaphantsi komhlaba aphuhlile kakuhle, uninzi lwemveku luphelile, kwaye uboya bungama-2 ~ 3cm ubude. Uzipho lomnwe ludlule kwincam yomnwe. Intshukumo esebenzayo yemilenze, ukukrwela okukhulu, i-reflex yokufunxa enamandla. Ubude bomzimba nobunzima bomntwana ongekazalwa buyanda kancinci kancinci ngenyanga yokukhulelwa, ukuze kube lula ukukhumbula, le fomula ilandelayo isetyenziswa ngokubanzi ukubala: ngaphambi kweeveki ezingama-20 zokukhulelwa ubude = isikwere senani leenyanga zokukhulelwa (cm), emva kweeveki ezingama-20 zokukhulelwa ubude = inani leenyanga zokukhulelwa ×5 (cm).