Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Kupfuurira: Vanzveri vanofungidzira kuti pamuviri 8 panoberekwa pamuviri 1 panoberekwa vana vakawanda, asi mwana mumwe chete ndiye anoguma aberekwa, nokuti mumwe mwana wacho anenge afa achiri mudumbu uye anenge asina kuonekwa kana kunyorwa. Kuongororwa kwekutanga kwechirwere chechibereko chinonzi ultrasonography dzimwe nguva kunoratidza mwana ari mudumbu "ari kuwedzera", uyo anokundikana kukura uye panzvimbo pezvo anoparara ndokunyangarika muchibereko. Kune zvikonzero zvinoverengeka zve"kunyangarika" kwomwana asati aberekwa, kubatanidza kuva kwake akabatanidzwa kana kuti kunyudzwa nomumwe mwana asati aberekwa, placenta kana kuti amai. Izvi zvinonzi vanishing twin syndrome. Uyewo, muchikamu chisingazivikanwi chezviitiko, mazygote maviri angabatana nokukurumidza pashure pokubata pamuviri, zvichiparira chibereko chimwe chete chechimeric, uye, gare gare, mwana asati aberekwa.  Mubvunzo: Chii chinonzi chinetso umo mapatya anoparadzana ari mudumbu?
chirwere chemapatya ari kutsakatika