Yintoni ebonisa isondo somntwana?

Kunzima ukucinga ngobomi bentsapho ngaphandle koonyana. Kodwa kaninzi umama nobawo, okanye omnye umntu kubo ufuna kakhulu unyana okanye intombi. Emva koko umbuzo uvela, yintoni eyenza isondo somntwana kwaye nokuba kunokwenzeka ukuphakamisa amathuba okuzalwa kwinkwenkwe okanye intombazana ngaphambi kokukhulelwe. Njengoko kuyaziwa, iqanda lomfazi liqulethe i-X ye-chromosome kuphela, ngelixa i-sperm ingaba ngumthwali we-X ye-chromosome kunye ne-Y ye-chromosome, ngo-50 ukuya ku-50.

Xa i-ovum ixiliswa nge-spermatozoon yeqela lokuqala, inhlanganisela yama-chromosomes XX ifunyenwe, oku kuthetha ukuzalwa komntwana osetyhini. Xa udibanisa i-XY, uba ngabazali benkwenkwe. Ngoko ke, ukuba unenkxalabo enzulu malunga nokuba ngubani oya kubakho, kubalulekile ukuqonda ukuba isondo lomntwana esizayo kuxhomekeke kuyo.

Izinto ezichaphazela impawu zesondo

Ngexesha lokulala emzimbeni, abafazi bafumana i-spermatozoa yezigidi ezingama-300 ukuya kwezi-500. Njengoko bewela kwindawo engummangaliso, abaninzi bafa ngokukhawuleza. I-spermatozoa ephilileyo yodwa iphila ngokutshintshela kwi-mucus yomlomo wesibeleko, esine-reaction alkaline encinane, kwaye iqalise uhambo lwayo kwi-tube fallopian, efuna ukutshiza iqanda. Kule nqanaba libekwa, nokuba umntwana uya kuthanda ukuhlambalaza nge-tapewriters okanye ukudlala amodoli.

Kwaye ngoku kwintlalo yesayensi, iingxabano ziqhubeka malunga nokuba isondo somntwana sincike kwindoda okanye kumfazi, kodwa kunokwenzeka ukuba, ngabazali bobabini banecala ngakumbi ukuba ngubani oya kuzalelwa. Makhe siqwalasele ngamaphi amakhwenkwe azalwa ngokuphindaphindiweyo, kunye nawaphi amantombazana:

1. I-Spermatozoa, abathwali be-X i-chromosome, bahamba ngokukhawuleza kunokuba bahamba nabo be-Y-chromosome. Ngako oko, ukuba ukuchumisa kwenzeka ngosuku lomhla wokuvuthwa okanye ngosuku olulandelayo (usuku lwe-14-15 lomjikelezo wesisigxina), ngoko u-Y-spermatozoa uza kufikelela kwi-ovule ngokukhawuleza kunokuba abaxhasi be-X, ngoko le nkwenkwe iza kuzalwa. Ngakolunye uhlangothi, i-X-mpikiswano yabo iyasebenza kakhulu, ngoko ukuba isondo sesini senzeke iintsuku ezimbalwa ngaphambi kokuvuthwa (usuku lwe-12-13 umjikelo kunye nobude balo), enye yazo iya kuququzelela i-ovum. Emva koko kulungile ukulinda le ntombazana.
2. Nangona i-geneticists zanamhlanje zibonisa ukuba isondo somntwana sincike ngokupheleleyo kumntu, abanye abaphandi bathi umama unako ukuphazamisa ukuba ngubani ozalelwe naye. Ukwenza oku, kufuneka uhambelane nesondlo esithile. Ukuba ibhinqa liphupha lendlalifa, kucetyiswa ukuba uvelise iimveliso zenyama eninzi kangangoko kunokwenzeka ekudleni, ilayisi kunye ne-semolina, izithelo ezomileyo, iizambatho, kunye netiyi kunye ne-alkaline yamaminerali. Kwaye ukuba ube ngumama weli ntombazana elinde ixesha elide, kuyimfuneko ukukhetha imifuno (ngaphandle kweetatate), iimveliso zobisi, intlanzi, amaqanda, iipesele, i-jams, i-nut, kunye nokusela kwamanzi amaninzi afakwe nge-calcium. Ngaloo ndlela, impendulo kumbuzo, nokuba isondo somntwana sincike kwintombi, iya kuba yinto enhle.
3. Kukho inkolelo yokuba xa ungafuni ukusondela Kwiinyanga ezimbini okanye ezintathu, intombazana iya kuvela. Ukuba umntu wenza izenzo zesondo rhoqo, ukuzalwa kwenkwenkwana kumtshato wesibini esitshatileyo kuqinisekisiwe.
4. Ukufunda ingxaki yokuba ngabazali baxhomekeke kwisini somntwana, iingcali zijongene nelokuba ukuba intsapho yabawo yayingabantu besilisa, ngoko, kunokwenzeka ukuba kulindeleke ukulinda ukuzalwa kwendlalifa.
5. Kukholelwa ukuba xa ukhulelwa umntwana kwinyanga leyo yonyaka (ngoFebhuwari, uEpreli, njl. Njl.), Ngoko uya kuba ngabazali beentombazana, kodwa ukuba uceba inkwenkwe, kungcono ukucwangcisa ukukhulelwa kwinyanga engapheliyo (ngoJanuwari, Matshi, njl. .).