Imibhangqwana eminingi ikholelwa ukuthi kungenzeka ngandlela-thile ithonywe ubulili bendodana engakazalwa, isibonelo, ukubala unyaka nenyanga yokukhulelwa, sebenzisa ukudla okukhethekile noma wokubala ukuvota ukuze ukhulelwe umfana . Eqinisweni, ubulili bomntwana kunqunywa kuphela yi-spermatozoon yowesilisa, oletha i-chromosome yesilisa noma i-X.
Kodwa kukholwa ukuthi i-spermatozoa ne-chromosome yindoda iyasebenza futhi iyashesha, kodwa futhi ifa ngokushesha, ngakho-ke kukhona ithuba lokukhulelwa umfana uma iqanda lihlangana ngokushesha nesidoda. Futhi uma isidoda kufanele silinde iqanda, yilo leli thuba lokukhulelwa intombazane, ngoba i-spermatozoa "yezinsikazi" iyanqanda futhi ihlala isikhathi eside.
Kumele kukhunjulwe ukuthi ngosuku lokuvuthwa kweqanda akungena emgodini we-uterine - ludabula izigubhu ze-uterine, ezinsukwini ezingu-3, futhi ngezinye izikhathi kuze kube yizinsuku ezingu-6. I-sperm ingayifinyelela nganoma isiphi isigaba - kusukela emathunjini omzimba kuya esibelethweni (ngokuya ngemisebenzi yabo yezimoto kanye nokuba khona kwemvelo evumelana nabo emgodini wesibindi). Le ndlela nakuba inelungelo lokukhona, kodwa ayiqinisekisi lutho. Futhi impendulo yokuthi ngabe ukukhulelwa komfana kungokoqobo nge-ovulation kuyoba kokubili okuhle nokubi - kumuntu onenhlanhla.
Ukuvuthwa nokukhulelwa komfana
Kukholelwa ukuthi ngelinye ilanga kudinga ucansi nokuvota, khona-ke ukukhulelwa komfana kuzokwenzeka. Futhi ukwandisa amathuba, udinga ishadi lokushisa elisezingeni eliphansi noma isilawuli sokuvuthwa sokukhulelwa komfana. Ungalali izinsuku ezintathu ngaphambi kokucasula, futhi ngemuva kokuya ocansini ezinsukwini ezintathu ezilandelayo ukusebenzisa ikhondomu, ngemuva kwesenzo socansi silele isigamu sehora lapho imilenze iphakanyisiwe. Indoda iseluleka ukuba ingagqoki izingubo ezifudumele futhi ungathathi amanzi okushisa kusukela ekuqaleni komjikelezo wesifazane ukuya ekukhuleni okungenzeka. Le ndlela iyathakazelisa, kodwa ungathukutheli kakhulu uma ingavumeleli ithemba - izici eziningi zithinta ubulili bomntwana ongakazalwa futhi akunangqondo ukucabangela konke, njengokuqagela ukuthi i-chromosome ifika eqanda.
Ukudla kokukhulelwa komfana
Ukwandisa amathuba okuzalwa komfana futhi ukwandise inani le-spermatozoa ne-Y chromosome, ukudla okukhethekile kwabesilisa nombili, okuthandwa kakhulu, kuye kwasungulwa. Kunconyiwe:
- itiye nekhofi;
- amaju;
- inhlanzi izitsha;
- isinkwa nama-biscuits;
- inyama;
- imifino;
- uju neshokoledi;
- izithelo ezintsha nezomisiwe;
- amafutha yemifino.
I-cocoa, ubisi nayo yonke imikhiqizo yobisi, amaqanda, ama-pancake, ama-pancake, i-ayisikhilimu, ushokoledi ubisi, ama-crabs kanye nama-prawn akukhuthazwa. Ngelinye igama, iningi le-sodium ne-potassium, i-calcium encane ne-magnesium, konke lokhu - amaviki amathathu ngaphambi kokukhulelwe, kodwa emva kwamasonto ambalwa emva kokufanele ukuphikisana: ngesikhathi sokukhulelwa, ubulili bomntwana kakade kunqunywa ngokungenakwenzeka.