Yini enquma ubulili wengane

Abantu abaningi bayazi ukuthi ucansi ingane Kumiswa inqubo akhulelwe kwasekuqaleni incike indlela isidoda ngeke zalisa iqanda. Intombazane ubizwa etholakala isidoda abathwele X chromosome, umfana - isidoda ne-Y-chromosome. Umbuzo uyasala ukuthi lokhu kwakwakhe ngengozi, noma ingabe kungaba sengathi noma iliphi ithonya?

Kusukela ezikhathini zasendulo, umbuzo ukuthi inquma ubulili umntwana, eziningi abantu ukhathazekile. Kunezindlela eziningi ezahlukene ukuthonya ocansini, kodwa iningi labo isekelwe ezinkolelweni eziyize Kodwa kukhona ulwazi olunje, okuyinto azinake. Ngakho-ke akusho sebekubeke bagomela ngokuthi akunakwenzeka ukuhlela ubulili umntwana.

Ukunqunywa theory, ebheka ubulili wengane

Izibalo uqinisekise ukuthi iningi abafana bazalwa izibulo, kulandele lokuzalwa, ematfuba yozalo incipha. Vele abazali abasha aba maningi amathuba okuba okukhulelwa yesilisa, futhi aba amaSheshi, ngokulandelana. Ngo abantu sifo, ngokuyisisekelo ozalwa intombazane.

Ngaphezu kwalokho, kukhona ulwazi izingane umehluko encane kaningi ozalwa bobulili obufanayo, uma lokuzalwa kwenzeka ngesikhathi esingaba iminyaka engaphezu kwemithathu, izingane ezimweni eziningi zizalwa kwabobulili. Lapho phakathi isisu nokukhulelwa isifika isikhathi esifushane, kungenzeka ukuba intombazane, nokunye. Lena kuphela uhlu encane nekucabangela lapho kuncike wobulili umntwana.

Gynecologists anolwazi ongamtshela izindaba ongenayo injabulo, lapho ucansi womntwana ombangela enkulu yesehlukaniso e-umndeni. Umbhali wayevame ukunezela lokhu omama kufanele ulalele ukumangalelwa ngokuthi abakwazi okukhulelwa indodana. Kodwa ngisho kusukela izifundo biology siyazi ukuthi inquma ubulili wengane - ngokukhethekile amadoda, futhi ikakhulukazi isidoda sakhe.

Uma abesifazane asakhona ukwenza ngaphandle iqhaza zamadoda e akhulelwe ingane emhlabeni bazohlalaphi kuphela amantombazane, njengoba amaqanda ithwala kuphela X - chromosome.

Ngokungafani X- futhi Y-chromosome

Spermatozoa nge X- futhi Y-chromosome babe ezinye izici ehlukile. X-chromosomes e kukhona olukhuni kakhudlwana futhi Y-chromosome lighter ngaphezulu ephathekayo. Ngokusekelwe ulwazi olunje, futhi kukhona inkolelo yokuthi akhulelwe phambi nge-ovulation Y-chromosome die Iqanda ivundisa futhi X chromosome, kuphumele intombazane.

Kodwa uma nje ebamba isisu kwenzeka ngemva ukukhiqizwa kwamaqanda futhi phakathi nayo, Y-chromosome kuyoba ngokushesha futhi umfana. Lezi ziphetho ziye ukuqinisekisile izifundo ezihlukahlukene olwenziwa mayelana nale ndaba, phezu kwabo ubulili umntwana.

Kodwa isidoda kungaba zalisa iqanda ngesikhathi umkhawulo othile isikhathi. Ngu ngenhloso kubalulekile ukuba sibe nesikhathi amahora 24-46. Ngemva kule nkathi yesikhathi iqanda uyafa. Uma owesifazane ebamba lwenzeke, kufanele ulinde umjikelezo evumayo esilandelayo. Njengoba ososayensi ukuchaza, lokhu kwentuthuko ngenxa yezinguquko asidi of the medium. I-ovulation eduze, ane-alikhali ngaphezulu zihlanganisa osenyameni evela zesifazane ipheshana zangasese.

Lapho kubalulekile ukwazi ubulili Ngokuzayo womntwana

Kwezinye izimo, abantu bobulili wengane namanje kubaluleke kakhulu, njengoba kukhona ezinye izifo wadlulela ingane ubulili ethile. Izifo ezihlala zihlanganisa ubuthulu, retardation engqondo, hemophilia nabanye. Uma ingozi enjalo, umama okhulelwe kumele uhambe ngenqubo ukusungula ubulili ikusasa lengane. Kwezinye izimo, ukucacisa ubulili umntwana engakazalwa noma cha, abazali uzinqumela.

Indlela esiqondile liqine ubulili wengane

Nge cishe 100% isiqinisekiso, ungasetha ubulili womntwana usebenzisa chorionic villus izibonelo zalokho. Kodwa le ndlela kuyingozi kakhulu futhi kungase kube nomthelela ekuthuthukisweni yezinkinga ngisho isisu. Setha ubulili wengane ngale ndlela kungaba njengoba emasontweni ayisikhombisa yokukhulelwa. Ngokuvamile, le nqubo kwenziwa udokotela, ngaphandle umama, osevele unezingane ezintathu bobulili obufanayo.