Isayensi kudala yafakazela ukuthi ubulili bengane engakazalwa buxhomeke kakhulu kubaba. Kodwa-ke kunenkolelo yokuthi owesifazane, ngandlela thile, uzothonya ukwakheka kokuthi le mpilo entsha izoba njani.
Eminyakeni eminingi eyedlule kwakucatshangwa ukuthi yilona wesifazane “okwakufanele asolwe” ngokuthi unendodana noma indodakazi yini. Futhi abanye obaba besikhathi esizayo basaphoxekile lapho bebona umntwana wobulili obungebona kuskena se-ultrasound - futhi bakholelwa ukuthi abahlangene nakancane nakho.
Isayensi kudala yafakazela ukuncika okuqondile kwe-biomaterial yesilisa kanye nobulili bengane engakazalwa. Konke kuzwakala kuqondile kakhulu: umphumela uncike ekutheni ingane izuza njengefa yini kuyise i-X noma Y chromosome, ebhekele ubulili.
Vele, ukuzalwa kwempilo entsha kunguchungechunge oluphelele lwezingozi, thina uqobo, ngokungafani nezakhi zethu zofuzo, esingenakukuthonya nganoma iyiphi indlela. Noma zikhona izindlela zokukhohlisa imvelo?
Vele, kwi-Intanethi ungathola incazelo yenani elithile lamasu okuthiwa asiza ukukhulelwa ingane yobulili obuthile. Futhi abanye "ochwepheshe" baze bakhokhise imali ngokubala ikhalenda lakho lokukhulelwa lomfana noma lentombazane. Kepha azikho iziqinisekiso zensizakalo enjalo.
Ukuze uthole imiphumela ecacile, ungaxhumana nomtholampilo wokuzala. Lapho bebelokhu behlinzeka ngezinsizakalo ze-IVF isikhathi eside, kuhloswe ngqo ekuzalweni kwengane yobulili obuthile. Kepha le njabulo ibiza kakhulu - futhi inezinkinga eziningi nemiphumela emibi.
Kodwa ososayensi bayaqiniseka ukuthi ezinye izinto ezihlobene nempilo nenhlalakahle kamama zingathinta ngempela ukuthi ngubani okhulelwayo - umfana noma intombazane. Kepha, kunjalo, akufanele uthembele ekusebenzeni kwabo kuphela. Ukuzimisela kobulili kuseyi "lotto" enkulu!
Yebo, ubulili bengane engakazalwa buthonywe kuphela ngofuzo lukababa. Kodwa-ke, isidoda esisodwa singangena eqandeni, noma esihluke ngokuphelele. Futhi kunezifundo ezifakazela ukuthi uma owesifazane ehlangabezana ne-orgasm ngesikhathi sokusondelana, unethuba elithe xaxa lokuzala indodana. Isizathu salokhu kuleli cala kuzoba ushintsho kwezemvelo. Imvelo yesitho sangasese sowesifazane ngemuva kwe-orgasm izoba yi-alkaline, futhi lokhu, kukhuthaza ukudlula okusheshayo kwesidoda nge-Y chromosome eqandeni.
Kukhona nenguqulo amadodana avame ukuvela kulabo besifazane umzimba wabo olawulwa yi-testosterone "yowesilisa". Kodwa-ke, kufanelekile ukukhumbula ukuthi nge-testosterone eyandisiwe, amathuba okukhulelwa ngokuvamile ancipha. Umjikelezo we-ovulation uyahlanekezelwa, ukuya esikhathini kuba okungajwayelekile, futhi ingozi yokukhulelwa kwesisu iyanda.
Enye into engabonakali ethinta ubulili bengane impilo yengqondo kanina. Ososayensi bakholelwa ukuthi abesifazane abathola ukucindezeleka isikhathi eside banamathuba amaningi okuba nendodakazi kunendodana. Akunabuhlobo obuqondile phakathi kwalezi zenzakalo. Kodwa kukhona ubufakazi obuningi bezibalo ngemuva kokushaqeka okukhulu kanye nezinhlekelele (isibonelo, ukuqhuma kweTwin Towers e-USA noma ukuwa koDonga lwaseBerlin) iningi labesifazane lazala amantombazane.
Uyakholelwa yini ukuthi ubulili bengane bungacushwa ngaphandle kokubonisana nochwepheshe?
Izinto ezisetshenzisiwe