Ukuphuza Ubisi Kungabangela Amabili
Kunezinkolelo eziningi kakhulu ngezimbangela zamawele . Ezinye izinkolelo zisekelwe eqinisweni lesayensi, kanti ezinye ziyi-anecdotal. Yonke imindeni cishe inayo inkolelo yayo, kodwa enye eye yabhalwa eminyakeni yamuva nje ixhumano phakathi kokudla okuphezulu ebisi nemikhiqizo yobisi kanye nokwanda kwamawele.
Ngo-2006, kukhishwe isifundo sokuthi abesifazane abafaka imikhiqizo yobisi ekudleni kwabo kwansuku zonke banamathuba amahlanu okuba namawele kunodadewabo be-vegan.
Umagazini ka-May 2006 we -Journal of Reproductive Medicine wawuhlanganisa umbiko ovela kudokotela e-Long Island Jewish Medical Center ophetha ngokuthi ukusetshenziswa kwemikhiqizo yobisi kuphakamisa amathuba omama wokukhulelwa amawele. Ucwaningo lwabikwa kabanzi emithonjeni yezindaba ezidumile ezifana neThe New York Times, i-BBC News, ne-LiveScience, futhi ukuhanjiswa kwaholela abantu abaningi ukuba bakholelwe ukuthi ocebile ngokugcwele ubisi kungandisa amathuba okuba namawele.
Nazi ezinye imininingwane mayelana nesifundo. UDkt. Gary Steinman weSikhungo Sezokwelapha saseLong Island (LIJ) eNew Hyde Park, NY wafunda amaqembu amathathu abesifazane:
- Izitshalo (labo abangazange badle imikhiqizo yezilwane nhlobo)
- Ama-Vegetarians (labo abangazange badle inyama kodwa badla imikhiqizo yobisi)
- Omnivores (labo abadla inyama, kuhlanganise nemikhiqizo yobisi)
Imiphumela yocwaningo lwakhe yabonisa ukuthi iqembu labesifazane be-vegan babenezinwele kanengi kangako - eqinisweni, kancane kancane izikhathi ezinhlanu - kunamanye amaqembu.
Umbono wakhe wukuthi i-Insulin-Like Growth Factor (i-IGF), iphrotheni esiza ama-embry kusinda phakathi nezinyathelo zokuqala zentuthuko, iphakanyisiwe lapho izinkomo zinikezwa i-hormone yokukhula ukwandisa ukukhiqizwa kwabo ubisi nenkomo. Lapho abesifazane bephuza ubisi kulezi zilwane, ama-hormone awo asabela, avuselele ukuvuthwa.
Waxhuma inkolelo yakhe ekukhuleni okusheshayo ekubelethweni okuningi eminyakeni engamashumi amathathu edlule. Ukwanda kwavame ukubhekwa eminyakeni yobudala obudala kanye nokusetshenziswa kakhudlwana kwezobuchwepheshe bokuzala. Kodwa-ke, lolu cwaningo luphakamisa ukuthi imikhuba yokudla ingase ibe yisici.
Kungase futhi kuchaze ukuthi kungani ukwanda kubonakala kuphela ekuhlanganyeleni, noma nge-twinning, etholakala ekukhuliseni amaqanda amaningi. Ngokufanayo, noma i- monozygotic , ama-twinning rates ahlale engashintshi. Amawele e-monozygotic ayenzeka uma iqanda elilodwa elikhulelwe lihlukaniswa laba yizibili. Kusukela okwamanje, akekho oye wachaza ngokucacile izimbangela zejubane le-monozygotic.
Ubufakazi obusha mayelana nokuqothula kanye nokudakwa
Eminyakeni kusukela isifundo sokuqala sikaSteinman sakhishwa, lo mbono ubizwa ngokuthi umbuzo. Ukubuyekezwa okulandelayo kutholakala amaphutha ekutadisheni, kubandakanya isampula yokucwaninga. Ubufakazi obuphikisanayo bubonisa ukuthi amazinga e-IGF ezinkanjeni eziphathekayo ayinto encane nokuthi umthelela wokugaya ngokusetshenziswa kwemikhiqizo yobisi awunaki abantu. Ngakho-ke, ukuxhumana phakathi kokudla okunomsoco kanye nokuhlala kwejubane kunamathemba. Kungenzeka ukuthi ukudla okunomsoco ompofu phakathi kwabesifazane be-vegan ababambe iqhaza ekutadisheni kwakungenzeka ukuthi kunesichazamazwi sokwehla kwe-twinning.
Nakuba kungumqondo othakazelisayo wokuthi ukuphakama kwenani lokuzalwa eliphezulu lokusetshenziswa kwemikhiqizo yobisi, kukhulunywa njengeqiniso lezesayensi.
Imithombo:
I-Bakalar, N. "Ukunyuka Emalini Okuzalwa Kwezibili Kungase Kuboshwe Kwesihloko Sezinyosi." I-New York Times , Meyi 30, 2006. Ifinyeleleke ngo-February 12, 2016. http://www.nytimes.com/2006/05/30/health/30twin.html
I-Collier RJ, i-Bauman DE. "Ukuvuselela ukukhathazeka kwezempilo komuntu ngokusetshenziswa kwesibhakabhaka esivela ekutheni i-somatotropin isetshenziswe ezinkolweni zobisi." Journal of Animal Science. , Ngo-Ephreli 2014, pg. 1800-7.
Steinman, G., "Izindlela zokuwahlukanisa: VII. Umphumela wokudla nokudla kwesilinganiso somuntu wokugubula." I-Journal of Medicine Reproductive, Meyi 2006, isb. 405.