Chinhu chisingawanzoitiki, superfetation, kana superfoetation, ichokwadi chokuti mukadzi anova nepamuviri paanenge atova nepamuviri, mazuva mashomanana chete akaparadzana. Parizvino nyaya dzinenge gumi chete dzasimbiswa munyika. Ukuwo, nhumbu yakanyanyisa kubatwa nemhuka, kunyanya makonzo akaita setsuro.

Kazhinji, mukadzi anomira ovulation paanenge ava nepamuviri. Superficial inyaya yekuve nemaovulation maviri, anonoke nemazuva mashoma. Naizvozvo tinogona kuona mafertitions maviri emaoocyte, ayo anogona kuve mugumisiro wehukama huviri: nemudiwa mumwechete kana varume vaviri vakasiyana. 

Mafetus maviri aya anozodyarwa muchibereko obva ashanduka. Naizvozvo vanozove nehuremu hwakasiyana uye hukuru. Chiitiko ichi ndicho chakanyanya kushaikwa sezvo kugadziridzwa kweendometrium, kunonziwo uterine lining, kazhinji hakuenderane nekuiswa kwerimwe zai muchibereko. Chokwadi, mumazuva anotevera kusangana, inokora nekuonekwa kwetsinga nemasero kuti ipe mhoteredzo yakanaka yekusimwa.

Nyaya ye in vitro fertilization (IVF)

MuFrance, panguva yeIVF, vanachiremba vanodyara huwandu hwema "embryos" ane makore anogona kusiyana kubva paD2 kusvika kuD4 semuenzaniso. Nguva yavo ichamiswa nemazuva mashoma. Tinogona kutaura nezve nhumbu yakawandisa.

Kazhinji, kuongororwa kwechiremba kwakakwana kuchatsanangura chiitiko ichi chinoshamisa. Mune chidzidzo chakabudiswa muna 2008 ne Chinyorwa cheObstetrics uye Reproductive Biology *, masayendisiti anopa mazano akati wandei: 

• A genetic system "nemhando uye / kana kuwanda inokurudzira kugadzirwa kwehCG, inogona kukonzeresa imwe ovulation uye inobvumira kuisirwa"; 
• Ovulation kaviri: dzimwe nguva inoitika kuvakadzi pamishonga yekusimudzira kubereka; 
• A uterine malformation: senge didelphic uterus, inonziwo chibereko cheviri, semuenzaniso.

Kana iri nyaya yezvepamusoro-soro, hatigoni kutaura nezvemapatya anonambwa panguva yebonde rimwe chete. Mapatya eMonozygotic anogadzirwa kubva pazai rimwechete rakakamurwa kuita maviri mukati memazuva gumi nemashanu ekutanga mushure mekusangana. Panyaya yemapatya e dizygotic, kana kuti "mapatya ehama", tinocherechedza kuvapo kwemaoocyte maviri akaitwa nespermatozoa maviri panguva imwe chete yeshumo.

Iko kushomeka kwenyaya uye kusava nechokwadi kwevamwe vashandi vezvehutano vachiona chiitiko ichi, zvinoita kuti nhumbu ive yakanyanyisa kunetsa kuona. Vamwe vachavhiringidzika ne dizygotic mapatya pamuviri.  

Kunyanya kuderera kwekukura kwe intrauterine kweimwe ye fetus inoita kuti zvikwanise kufungidzira pamusoro pepamusoro. Zvichava zvakakosha kuziva kana kusiyana kwehurefu kunokonzerwa nekusiyana kwezera rekudzivirira kana kana iri chirwere chekukura chinogona kuva chiratidzo chekusagadzikana kana dambudziko rehutano mune ramangwana. mwana.

Sezvakaitika pakuberekwa kwemapatya, kusununguka kwekutanga kwechibereko kunotanga iyo yechipiri. Vacheche vanoendeswa panguva imwe chete, kunyange zvazvo mumwe wevacheche achange asina kukura zvishoma.