Isenzakalo esingavamile samawele esibuko senzeka cishe kuma-25% kuphela amacala. Igama elithi "isibuko" libhekisela eqinisweni lokuthi izingane zizalwa zifana ngokuphelele, njengobhontshisi ababili ebhodweni.
Laba ngabantwana abazalwa befana ngamawele , okusho ukuthi bakhulela esibelethweni kusukela ekukhulelweni kweqanda elilodwa kanye nesidoda. Bakha i-zygote, ehlukana ibe yizibungu ezimbili. Ake sihlole ezinye izici zabo ngokuningiliziwe.
Anjani ama-cufflink esibuko?
Njengoba sesishilo kakade, bangamawele angama-monozygotic. Bangamawele afanayo noma angama-monozygotic. Banesici esiyingqayizivele: badalwa ngokukhulelwa kweqanda kanye nesidoda , okudala i-zygote ehlukana ibe ama-embryo amabili. Babelana ngesinye isici esibalulekile: lawa mawele akhula futhi abelana nge-placenta efanayo kanye ne-amniotic sac.
Kungani behluke kwabanye abakhulelwe abangamawele?
Ukukhulelwa kwamawele kungahlukaniswa komunye kuya kokunye ngesikhathi i-zygote idala ukuhlukana kwayo. Kunamacala ahlukene:
Amawele angefani noma e-dizygotic
Lawa abizwa ngokuthi amawele angama-fraternal. Kungumphumela wokukhula kwama-embryo amabili esibelethweni, kodwa kulokhu, owesifazane ukhipha amaqanda amabili, futhi womabili avundiswa yisidoda esihlukene. Lawa ngabantwana ababili abakhulele esibelethweni esifanayo kodwa abahlanganyeli nge-amniotic sac, i-placenta, noma izakhi zofuzo. Ababili kwabathathu abakhulelwe abaningi balolu hlobo.
Amawele afanayo noma e-monozygotic
Yibo asebechaziwe. Kulapho iqanda selivundisiwe nalapho i-zygote ihlukana kabili. Lapho kuhlukaniswa, imibungu emibili idalwa enomthwalo wofuzo ofanayo.
- I-Bichorial ne-diamniotic. I-zygote ihlukana ezinsukwini ezintathu emva kokuvundiswa. Kulokhu, imibungu eyakhiwe yondliwa yi-placenta yayo futhi ikhula esakeni layo le-amniotic.
- I-Monochorionic ne-monoamniotic. Ukuhlukaniswa kwe-zygote kwenziwa kamuva kakhulu, phakathi kosuku lwesikhombisa nolweshumi nantathu lokuvundiswa. Lapha imibungu yabelana nge-placenta efanayo kanye nesaka le-amniotic elifanayo. Yilapho amawele esibuko angafakwa khona, nakuba enza isici sokuhlukanisa phakathi kosuku lwesishiyagalolunye nolweshumi nambili ngemva kokuvundiswa. Kulokhu, ukuhlukaniswa kwe amaseli afana ncamashí, elinye kwesokunxele nelinye kwesokudla.
Kulesi sigaba, kungenzeka ukuthi kwenzeke into yokunyamalala kwamawele , lapho elinye lama-embryo lihluleka ukukhula ngokugcwele futhi limuncwa ngumama, i-placenta, noma elinye iwele. Lokhu kutholakala lapho i-ultrasound ejwayelekile ngenyanga yesithupha yokukhulelwa iveza ukuthi kukhona ama-embryo amabili noma ngaphezulu. I-ultrasound elandelayo ikhombisa ukuthi elinye lama-embryo selinyamalele kanti elinye liyaqhubeka nokukhula ngendlela evamile.
Izici ezingavamile ze-mirror cufflinks
Laba bantwana babonakala ngesikhathi sokuzalwa ngenxa yezici zabo ezingavamile. Izitho zomzimba ezikhule emizimbeni yazo zingase zibe sezimweni eziphambene. Isibonelo, inhliziyo, isibindi, noma i-spleen zingase zibe sezinhlangothini eziphambene zemizimba yazo. Lesi simo, esibizwa ngokuthi i-situs inversus , asivamile kakhulu, senzeka koyedwa kuphela kwabayi-10.000 abazalwa. Ngisho nezici ezibonakala zincane njengezinwele, izimpawu zokuzalwa, noma ama-moles zingadala umphumela wesithombe sesibuko.
Kuqoqwe idatha ekhombisa ukuthi bangenza izinto eziphambene; omunye angaba ngesandla sobunxele kanti omunye abe ngesandla sokudla, futhi baze balale ezindaweni ezingafani. Ukuziphatha kwabo kuye kwafundwa, kwembula ukuthi omunye ubonakalisa ingqondo ephambene nenye.
Ezimweni eziningi, lolu hlobo lwamawele luhlolwa ngabazali ngokwabo, ababona ezinye zezici esezichaziwe. Kufanele kuqashelwe ukuthi lokhu kukhulelwa akuvamile kakhulu, kodwa akunakwenzeka. Cishe uyazi othile oke waba nalolu hlobo lokukhulelwa.