Twins an bayyana su a matsayin "... matasa biyu waɗanda aka haife su daga lokaci guda." ( Encyclopedia Britannica ). Ka lura cewa ma'anar kawai tana nufin uwar. Amma me game da uba? Shin ma'aurata suna da ubanninsu daban-daban?
Twins Tare Da Ubannin Daban
Kamar yadda fasaha ya inganta daidaituwa da kuma amfani da gwajin kwayoyin, ya zama mafi mahimmanci cewa ma'aurata suna da iyayensu biyu.
Abinda ya faru ne kawai ya shafi tagwaye ( dizygotic ), ba ma'aurata guda biyu ( monozygotic ) ba, wanda ya kasance daga nau'in kwai kwai daya / sperm. Ma'aurata Monozygotic ba su da iyayensu daban-daban.
Duk da haka, jima-jita-jita suna haifar da hyperovulation, da sakin ƙwai da yawa a cikin guda ɗaya. Superfecundation ya bayyana halin da ake ciki inda qwai ya hadu da kwayar jini daga bambancin jima'i na jima'i. A cikin yanayin da mace ta yi jima'i tare da abokan tarayya daban, ma'aurata suna da iyayensu daban-daban. Lokacin da ya dace don bayyana halin da ake ciki shi ne farfadowa da yawa .
Misalan yarinya da iyayensu daban
Wannan halin na iya faruwa yayin da ma'aurata ke haifar da jiyya na haihuwa, misali, batun Koen da Tuen Stuart, mazaunin Holland waɗanda suka kasance daga IVF (hadewar in vitro). A cikin haɗuwa a lab, an yi amfani da kayan aiki sau biyu, yana haifar da yaduwar maniyyi da uban.
A New Jersey, mahaifiyar mahaifiyar ta shawo kan gwaji don neman taimakon jama'a. Bayan gwajin ya nuna cewa abokin tarayya ne kawai mahaifin daya daga cikin ma'aurata, ta yarda cewa ta yi jima'i tare da wani mutum a cikin wannan makon da aka haifa mamaye.
Mahaifiyar tagwaye a Texas sun yarda cewa tana da wani abu tare da wani namiji lokacin da aka haifa mamaye.
Gwajiyar jaririn ta nuna cewa budurwarta ita ce mahaifin daya daga cikin yara maza biyu, amma wani mutum shi ne mahaifin mahaifa na sauran ma'aurata.
Sources:
Baldwin, V. Tsarin Halittar Ƙwararriya. Masana Kimiyya da Harkokin Kasuwanci, 2012. Print. p. 13.
Grossman, J. "Tsohon Jakadanci: Dokokin Mace na Abokin Jima'i da Ubansu dabam." Kamfanin Scholarly a Hofstra Law, Mayu 12, 2015.
Mueller, B. "Tsohuwar Matsala ga Iyaye na Twins Ya Zama Sakamakon Sakamakon: Uban Biyu." The New York Times, Mayu 7, 2015.