Akukho mfihlelo yokuba namhlanje izibini ziqaphela ngokugqithiseleyo isondo ngesiganeko esizayo. Ukwangoku, kukho iindlela ezininzi zokucwangcisa ngesondo somntwana ongakazalwa. Ezi ndlela ziba zihamba phambili. Uninzi lwale ndlela luqulunqwe ngabasetyhini ngokwabo.
Namhlanje, iindlela ezisetyenziswe ookhokho zibonakala zihlazo kwaye zikhohlakele. Ngokomzekelo, iikholeji ezimbalwa ezedlule abantu babekholelwa ukuba xa, ngexesha lokusebenza kwemitshato yomtshato, beka isikhephe phantsi komsila, inkwenkwe yayiza kuzalwa, kwaye ukuba kwakukho isando, kwakukho intombazana. Kwakhona, ukuba kwindlela yokudala indlalifa indoda igqoke intloko yomntu, ke iya kuzalwa umntwana.
Izindlela zanamhlanje zokucwangcisa ngesondo lomntwana ongakazalwa zisuswe kude nakwazo zangaphambili. Ngoku banesiseko sesayensi. Ukubala kuthatha i-genetic predisposition, ukutya okusetshenziswe ngaphambili nangesikhathi sokukhulelwa, kwaye, ngokuqinisekileyo, iqela legazi labazali bexesha elizayo.
Abafazi banamhlanje bayithandwayo ngokuthandwayo ngokweendlela zekhalenda. Le ndlela isekelwe kwizibalo ngekhalenda. Indlela yekhalenda isekelwe kwizinto zenzululwazi kwaye kwiimeko ezininzi ziya kunceda ukuqikelela ngesondo lomntwana ongakazalwa.
Usebenza njani? Yonke into ilula ngokwaneleyo. Wonke umntu uyazi ukuba umzimba wesetyhini usebenza ngokusesikweni. Umsebenzi oyintloko wale nkqubo kukuba ukuhluthwa kweqanda kunye nokulungelelanisa ukuchumisa. Oku kuthiwa yi-ovulation. Ukuvuthwa kwabasetyhini kubakho malunga naphakathi komjikelezo wenyanga. Ngomntu ngamnye ngumntu. Ixesha elihle kakhulu lokukhulelwa lintsuku ezimbini ngaphambi kokuvuthwa kunye neveki emva kokuvuthwa. Kumele ubale ngokuchanekileyo kwaye uqinisekise ixesha lokuhamba kwakho. Kodwa oku kuphela ukuqala kwazo zonke izibalo.
Njengoko kwaziwa nakwindlela yokufunda yesikolo, isondo somntwana kuxhomekeka kwindlela ama-chromosomes aya kudibanisa ngayo ngexesha lokuchumisa kweqanda. Ukudibanisa kwama-chromosomes XX kwintombazana, kunye ne-XY ye-chromosome kumfana.
Izibalo ezisekelwe kwindlela yekhalenda yokumisela isondo somntwana ozayo zisekelwe kwiingcamango zokusebenza kwe-chromosome. Iingcamango zithi i-Y i-chromosomes, oko kukuthi, yamadoda, ininzi yeselula, kodwa iyancinci. I-chromosomes ye-X, ngokuchaseneyo, iyancipha, kodwa iyancipha ngakumbi. Ukuba isondo sesini senzekile ngaphantsi kweentsuku ngaphambi kokuvuthwa okanye ngokukhawuleza emva koko, ukukhulelwa kwenkwenkwe enokwenzeka ukuba i-80% iyenzeka. Oku kungenxa yokuba, njengoko sele kukhankanywe ngasentla, ukuba i-chromosomes Y zihamba phambili. Ukuba isondo sesondo senzekile ngaphezu kosuku olunye ngaphambi kokuvuthwa kweqanda, okanye emva komhla emva kokuvuthwa, ukukhulelwa kwintombazana kuyenyuka.
Ngokwenyaniso yale ngqungquthela, izazinzulu ziye zavela ngophando oluninzi. Idatha efunyenwe kulolu cwaningo iyanceda sikwazi ukuxhamla phakathi kwesini somntwana kunye nosuku xa ukukhulelwa kwakhe kwenzeka.
Ngoku akunzima ukuba ubale ngeendlela zekhalenda, xa intombazana iya kuzaliswa, kwaye xa le nkwenkwe ikhona. Khumbula, kuba le ndlela yintloko yenkcazelo ecacileyo yosuku lokuhamba. Ukuchonga umhla ochanekileyo we-ovulation, kufuneka uqaphele utshintsho kwiqondo lokushisa, ugcine isakhiwo sokukhutshwa. Kodwa namhlanje kukho indlela ethembekileyo yokwenza umlinganiselo wokuvuthwa kwe-ovum - ezi zivivinywa zokuvuthwa kwe-ovulation, ezingathengwa nayiphi na ikhemisi.
Ukuba inkqubo ye-ovulation yowesifazane iwela ngqo phakathi komjikelezo wekhalenda, ngoko ke unokucetyiswa indlela elula yokucwangcisa ngesondo somntwana ongakazalwa. Kwiminyaka engaqhelekanga yobomi bomama kwiinyanga ezilandelelweyo, ezifana noFebruwari, uEpreli, ngoJuni, uAgasti, njl., Le nkwenkwe iyakwazi ukukhulelwa. Kwaye, ngokunjalo, amathuba okukhulelwa intombazana kwiminyaka yobomi kwiinyanga ezingaqhelekanga, ezifana noJanuwari, Matshi, uEpreli, njl., Ukwanda.
Kakade ke, ezi ndlela aziboneli ngokuqinisekileyo ngokupheleleyo ekuqaliseni ngesondo lomntwana. Umzimba wesetyhi ngokwawo uyisakhiwo esiyinkimbinkimbi. Zininzi izinto ezichaphazelayo. Ukuba uyaya kwiimvavanyo, kungcono ukuba ungafumani indlela yekhalenda.