Odokotela abahlanganyeli nemibono evamile evunyelwe ukuthi izithelo ezinkulu zingumntwana ophilile futhi onamandla. Okokuqala, lokhu kuyimbangela yokukhathazeka ngenxa yezinkinga zomama nomntwana okungenzeka ngesikhathi sokubeletha. Ingane kusuka kwamakhilogremu amane kuya kwanguhlanu ibhekwa njengakhulu. Amantombazane anesisindo esingaphezu kwamakhilogremu ayisihlanu abhekwa njengama-gigantic.
Ukukhula nokuthuthukiswa kwe-fetus kuncike empilweni yomama wesikhathi esizayo kanye nesimo se-placenta, esisekela ubudlelwane bomama nobunzima. Uma kungekho izinto ezilimazayo zangaphakathi nangaphandle, khona-ke ingane ikhula ngokuvumelana nezikhathi ezithile. Namuhla kukhona ukuthambekela kokwanda kwenani lamacala ngokuzalwa komntwana omkhulu. Inani lamacala anjalo ngokusho kwedatha ehlukene kusukela kumaphesenti ayisishiyagalolunye kuya kwesishiyagalombili.
Izimbangela ze-fetus enkulu ngesikhathi sokukhulelwa
Izizathu zokuthi kungani owesifazane okhulelwe angaba nomthelela emntwaneni omkhulu angase abe nemvelo ehlukile, kodwa okuyinhloko ukwanda kokungenwa kwabesifazane abakhulelwe nokuzalwa. Ngesikhathi ukhulelwe, udinga ukulinganisa ukudla ukuze ukwazi ukuhlangabezana nezidingo zamandla zomama nengane. Ngesikhathi esifanayo, kubalulekile ukucabangela ukuthi lona wesifazane kakade akakhombisi ukuphila okusebenzayo njengangaphambili, futhi izindleko zakhe zamandla ziyancipha.
Okubi, isisindo sowesifazane sithinteka ekusebenziseni izinto ezinamakha amafutha, okwandisa ukudla, ukusetshenziswa kwama-carbohydrate okusheshayo ngokweqile, ukudla okusheshayo kokudla, lapho ama-khalori angenayo isikhathi sokuthola ngokwanele. Konke lokhu kungaholela ekuthuthukiseni isifo sikashukela , okuyinto futhi imbangela yentuthuko ye-fetus enkulu.
Ubukhulu be-fetus buyathinteka yizici ze-morphological ze-placenta. Phakathi kwabo kuncike ngokuqondile. Uma ubukhulu be-placenta budlula amamentimitha amahlanu, ivolumu yayo kanye nendawo yanda, lokhu kubangela ukukhulelwa okukhulu kwe-fetal, njengoba izinqubo zokuqubuzana phakathi kwe-fetus nama-mother organisms zanda. Kukhona nokuthembela endaweni ye-placenta esibelethweni. Izithelo ezinkulu zivame kakhulu uma i- placenta ikhona ngemuva kwesibeletho .
Ukusetshenziswa okungalawulwa kwezidakamizwa ezithuthukisa ukujikeleza kwegazi kwe-utero-placental, kuvame ukuthuthukisa ingane enkulu. Ukuphulwa kwesimiso se-endocrine somzimba wesifazane kungabuye kube incazelo yokuthi kungani enesisu esikhulu. Lokhu kuhluleka komzimba kubangela izifo ezifana nesifo sikashukela nokukhuluphala. Isithelo sikhula ngokungenalutho, bese sehlisa phansi, bese siphuthuma.
Esinye isizathu sokuthi kungani ingane ingaba enkulu yi-perenashivanie. Kungaba isikhathi eside somzimba noma sokuphila kokukhulelwa.
Izithelo ezinkulu zivame ukutholakala phakathi kwezingane-malschikov. Futhi, izingane eziningi zivame ukuzalwa omama abancane abangaphansi kweminyaka engamashumi amabili nabesifazane abadala kunamashumi amathathu nane.
Ukuvimbela amantombazane amakhulu
Ukuvimbela ukuthuthukiswa kwe-fetus enkulu kubalulekile ikakhulukazi kwabesifazane abanezinkinga zemithi, isifo sikashukela noma ukukhuluphala. Kuzo zonke ukukhulelwa, omama abazayo badinga ukulinganisela ukudla kwabo ukuze kufane nezinga lomsebenzi womzimba. Kubalulekile ukuqapha izinga le-glucose egazini. Abesifazane abasolwa nge-fetus enkulu batuswa ukunakekelwa esibhedlela ngaphambi kokubeletha ukucacisa ukuxilongwa futhi bakhethe indlela efanele yokulethwa kwezidingo.