Isibungu sithinta kanjani iqanda?
Ezinganeni ezingavikelekile, cishe u-2-3 ml we- fluinal seminal fluid ungena kumfazi wesifazane , okungavamile ukuba aqukethe amangqamuzana angama-100 asebenzayo amagciwane asebenzayo.
Kusukela ku-vagina, i-spermatozoa iqala ukuthuthuka kwayo emgodini wesibeletho ukuze ingene emgodleni wayo, bese kuthiwa i-tube fallopian. Ukuhamba kwamaseli wesilisa ocansini kugqugquzelwa ukunyakaza kwezivumelwano ze-myometrium ngokwayo. Kwakusungulwe ukuthi ijubane lendoda alidluli 2-3 mm ngomzuzu.
Uma ungena emgodini wesibeletho somlomo wesibeletho, amangqamuzana omzimba wesilisa abhekene nesithiyo sokuqala endleleni - umuthi womlomo wesibeletho. Uma kunzima kakhulu futhi kuningi, ukukhulelwa kungase kwenzeke, ngoba I-Spermatozoa ayikwazi ukunqoba le nkinga.
Ukudlula emgodini womlomo wesibeletho, i-sperm ihlala emgodini we-uterine, lapho iya khona emgodini we-fallopian, lapho emva kwe-ovulation iqanda likhona.
Ukungena kanjani kwesilisa kuqanda?
Ukuhlanganiswa kwamangqamuzana omzimba wesilisa nowesifazane kubonakala ku-ampullar ingxenye ye-tube uterine. Emaminithini angama-30-60 emva kokuya ocansini i-spermatozoa ifinyelela emgodini wesibindi, kanti amanye amahora angu-1.5-2 aya endleleni eya ku-tube. Iqanda lifihlelwa yizinto ezikhethekile ze-enzymatic, ezibonisa isimo sayo ngqo futhi, njengokungathi, "ukuheha" i-spermatozoa.
Ukukhuluma ngokuthi ingakanani isilwane sesisu esiphila eqanda, kufanele kuqashelwe ukuthi kaningi sekuyihora eli-1-2. Khona-ke, amagobolondo we-spermatozoon ngokwawo ahlakazeka futhi i-nuclei yama-2 cells cells ahlanganisa, okwenza kube nokwakhiwa kwe- zygote.