Isonto lesithupha lokuthuthukiswa kwe-fetal lihambisana neviki 8 lokubeletha lokukhulelwa okwamanje. I-fetus isivele iyakwazi ukugubha izibambo, izibophe emhlangothini wegoli. Yingakho ngeviki lesishiyagalolunye lokukhulelwa owesifazane ozwa ukuzwa okufanelekile, okungukuthi, uzizwa ukuthi ingane ihamba. Nge-ultrasound, lezi zintuthuko zifana nokudumala okukhulu, ngoba imisipha yengane isabuthakathaka kakhulu futhi ubukhulu bokuhamba buyingcosana.
Ukubukeka kwe-fetus
Emibhalweni yama-8 okukhulelwa, i-fetus ibonakala ifana nomuntu obukeka. Iminwe ephethe izibambiso zide, kodwa ama-webs phakathi kwawo asalondolozwa. Amehlo atholakala ezinhlangothini zekhanda, abe nokubonakala kwamabala amnyama, kodwa ahlanganiswe nama-eyelidi asevele ebala.
Ngeviki le-8-9 lokubeletha, i-buds yamapayipi ezayo azokhula. Ziyi-branching bronchi, ngokubukeka okufana nomqhele wesihlahla. Ngalesi sikhathi, kutholakala izinso zangempela, okushiya indawo eyinhloko, eyayikhona ngaphambili. Ukuthuthukiswa kwalo kwenzeka ngesikhathi sonke sokukhulelwa, futhi ukwakheka kokugcina kwenzeka ngemva kokuzalwa.
Iviki le-7-8 lokubeletha lokukhulelwa likhona lapho kunciphisa usayizi nokunyamalala komsila wombungu. Ngesikhathi esifanayo, i-trunk iselulelwe, kodwa ubukhulu bayo bube kude namasiko avamile.
Ngesikhathi samaviki ayisishiyagalolunye ama-ambetric i-embryo iselula futhi igijima ngentshiseko ku-amniotic fluid, iguqula i-axis yayo ngemilenze yayo phezulu nangemuva. Ngokwesilinganiso, ubukhulu bomzimba wakhe ngalesi sikhathi ngu-1.5 cm.
Izici zesimo somfazi
Ngesikhathi samasonto ayisishiyagalolunye ezinzima, owesifazane ubhekana nezikhathi ezingathandeki zokukhulelwa. Ngakho-ke, ngalesi sikhathi ukuthi izidakamizwa ezivamile zenzeka, zifinyelele ezingeni eliphezulu. Isibonelo, uma owesifazane, evuka nje, ngokushesha ethatha ukudla kwasekuseni, khona-ke kungenzeka ukuthi isisulu sezinyosi ekuseni kulesi simo siphakeme kakhulu. Isici esithile sokuthi ukuhlanza kuthuthukisa ngendlela ephawulekayo, futhi owesifazane angasebenzisa usuku lonke ngaphandle kokugula. Iqiniso elithakazelisayo yukuthi ucwaningo lwezokwelapha zaseCanada lwenze ukuba kwenzeke ukuthi kulabo besifazane abahlukunyezwa yi-toxicosis kulo lonke ukukhulelwa, abantwana abazalwa babe namakhono amahle okuqonda.
Izinguquko ze-Hormonal
Uma sikhuluma ngesimo sangemuva sabesifazane, isonto le-8 le-obstetric lokukhulelwa okwenzeka ngokujwayelekile lilawulwa yi-progesterone ne-estrogen hormone.
Ukuhlushwa kwala ma-hormone kwanda ngezikhathi ezithile, ngoba isenzo sabo sihloselwe ukugcina ukukhulelwa. Yizi-hormone eziphumula umuthi wesisu, okwandisa usayizi njengoba ingane ikhula.
Ngesikhathi esifanayo, umzimba ophuzi uqala ukhiqiza i-hormone ukuphumula, okuyilapho kuveza ngokuqondile imishini yesiguli nesisu somsila wesisu. Njengoba isikhathi sokukhulelwa sanda, ukugxila kwegazi kukhula njalo futhi kufinyelele isikhathi esiphezulu ngesikhathi sokuzalwa,
Izinga likaHCG ku-8 ngesonto lokubeletha alinalo ulwazi oluncane. Yingakho isimo se-fetus sinqunywa ngosizo lwe-ultrasound.
Kanti futhi, abesifazane abangu-70% abakhulelwe ngalesi sikhathi kukhona ukukhuliswa kwesifuba, okungukuthi, kuqhuma kancane. Konke kuhlangene nama-hormone afanayo ahlanganiswa ekugxilweni okuphezulu.