Kubalulekile ukwazi ukuba isibini esitshatileyo sithathwa nje kuphela xa singenasifo, ukuba ngeminyaka emibili yobomi bezesondo rhoqo ngaphandle kokusetyenziswa kokukhulelwa, ukukhulelwa okulindelekileyo akukwenzeka.
Ngokwezibalo, kuze kube yimhla, ngaphandle kwezibini ezibini ezitshatileyo malunga neebini ezilishumi elinesihlanu ezingenasiphelo. Izibini zentsapho ezikwaziyo kwaye zivumela ukuba babe nabantwana abaninzi njengoko intliziyo yabo inqwenelekayo, engenakwenzeka, iya kukwazi ukuyiqonda kuze kube sekupheleni kwintlekele yalabo abanganikwa ithuba lokuba ngabazali abonwabileyo.
Izigidi zabasetyhini zikhupha isisu minyaka yonke, kodwa ngakwelinye icala kukho abo bafazi abenza imizamo ephezulu yokufumana ithuba lokuzala ubuncinane umntwana omnye. Kufanelekile ukukhumbula ukuba, nangona uphumelelo olukhulu lwezesayensi kunye nososayensi kwintsimi yokuveliswa komntu, kuphela i-15-20% yazo zonke izibini ezitshatileyo ezinengxaki ezifana nokungabikho komntwana kufumana ithuba elivuyisayo lokuzala umntwana onempilo kwaye ozele ngokupheleleyo.
Iimbangela zokungabikho kwabasetyhini kunye nenkcazo yabo:
Iimbangela zokungabikho kwintsapho ngokungaqhelekanga azifani namadoda. Ukungaphuhliswanga okanye ukuphazamiseka kwezitho zokuzala (izibilini ze-uterine kunye nesisu), kwenza kube nzima ukukhulelwa. Ngokuqhelekileyo, imbangela ebalulekileyo yokungabikho kwabantwana basetyhini yinkqubo yokuvuvukala eyenzeka kuwo onke amabhinqa asemibini abhekana nokukhipha isisu ebomini bakhe. Izibonda ze-Fallopian zinamathele kunye kunye nokuba nzima ukuba zidlule, ngenxa yoko umfazi osemncinci usongelwa ukungabikho komntwana okanye ukukhulelwa kwe-ectopic.
Njengezifo, kunye nokuvuvukala okudluliselwa ngocansi, abadluli ngaphandle kokulandelwa. Ukuqaliswa kweefom ze-chlamydia, i-syphilis, i-trichomoniasis, i-herpes yomzimba nayo ibangela ukuba kungabikho ntsholongwane. Ukuphazanyiswa kwama-ovari kuyinye yezizathu eziphambili zokungakwazi ukukhulelwa umntwana, kuba i-ovulation ayihambi kakuhle, okanye i-ovules ayiyivuthwa konke (ukuvuthwa akukhoyo). Ukuphulwa okunjalo kwenzeka ngexesha lokutshatyalaliswa kwinqanaba le-genetics okanye emva koko - emva kokukhipha isisu okanye ukubeletha.
Ukufakelwa kwempahla:
Ukuze uqhube inkqubo enjengokugqithiswa kokufakelwa, kufuneka ube nxaxheba ababini abalulekileyo kule nkqubo - inkunzi yembewu kunye neqanda lomfazi. Ukufumana imbewu yendoda (isisu) ayinomsebenzi omkhulu. Ukwenza oku, kuyimfuneko ukuthatha i-sperm yomyeni, ukuba, ngokuqinisekileyo, ihlangabezana nemigangatho efunekayo yesiphumo ukuba uphumelele, okanye uthathe isampula yembewu kwi-bermon yebhinqa.
Kodwa kunye nomfazi izinto ziyanzima kakhulu. Ukufunyanwa kweqanda lomnikeli, inkqubo ebiza kakhulu kwaye ichitha ixesha. Ngoncedo lweziyobisi ze-hormonal, i-super-ovulation yenziwa, apho kungekho iqanda elilodwa elivuthwayo, kodwa ngokukhawuleza ukusuka kwi-4 kuya kwe-6. Oku kuyimfuneko ukwenzela ukuba akuyi kuphinda kusebenze kwakhona, ukwenzela ukuba inokuthi ithathwe kwiqanda le-ovary, kwaye uyifumane ngexesha elinye ngangokunokwenzeka, mhlawumbi xa kwenzeka ukuba le nkqubo ingaphumeleli ngempumelelo.
Isigaba sesibini kukuba umsizi wesilwanyana kwisitampu sokuhlola udibanisa neqanda lomnikelo. Iseli ekhulelweyo, eyaqala ukuhlukana kwayo (zygote) ifakwe kwisisu. Ngoku kuhleli nje ukukhuthaza amahomoni akhethekileyo kwaye ulindele ukuba i-zygote ithathe iingcambu, okanye i-zygote ayiyi kuthatha ingcambu kumzimba wesifazane. Njengoko kwakushiwo ngaphambili, amathuba okuba uvavanyo luphela ngokuphumelelayo kwaye ingaba lo mfazi ukhulelwe aphezulu. Kunqabile ukuba nabani na onokukhulelwa okokuqala. Ukongezelela, iindleko zexesha ngalinye ziya kwiiyure ezingamawaka amabini. Kwaye ukuba uthe wagqiba ekubeni ukhulelwe ngale ndlela umntwana, ngoko uya kufuneka ufune ukukhupha, kodwa uvuyo lokuba nomntwana ufanelekile !!!