Umbuzo. : "Ingabe kukhona isizathu sokuthi amawele ahlanganiswe? Ingabe ikhona indlela yokuyivimbela ngaphambi kokuzalwa?"
Impendulo: Impendulo emifushane yalombuzo ngu "Cha." Ayikho indlela eyaziwa yokuvimbela i-twinning ehlangene. Kodwa ukuze uxazulule ngokugcwele inkinga yokuvimbela i-twinning ehlangene, kubalulekile ukuqonda kancane mayelana namawele ahlangene. Lona umbuzo onzima ukuphendula ngaphandle kokuqala ukubona ukuthi kungani amawele ahlangene ayenzeka nokuthi kungani kwenzeka.
Yini Ehlanganiswa Amawele Amawele?
Amawele ahlangene awuhlobo lwamawele e-monozygotic . Okusho ukuthi, zivela njenge-zygote eyodwa ehlukaniswa kabili. (I-zygote iyiqanda elikhulelwe.) Ngesinye isikhathi ngemva kokukhulelwa, njengoba i-zygote ihamba isondela esibelethweni sokufakelwa, amaseli ahlukana futhi ahlanganise. Futhi uma kwenzeka amawele e-monozygotic, amangqamuzana ahlukanisa bese enza njengama-blastocysts amabili, okuholela emawele. Lokhu kuhlukaniswa kungenzeka ezinsukwini ezimbalwa, kodwa kwezinye izimo, kubambezeleka futhi akuhlukanisi phakathi kwezinsuku eziyishumi nambili noma ngaphezulu. Yilapho ama-twins ahlangene amafomu, amawele avela esibelethweni ngokuxhumeka ngokomzimba. Njengoba leli gama liphakamisa, basuke babebili abantu abahlangene ndawonye. Bangase bahlanganyele isikhumba nezicubu, noma bangase bahlakulele ngezigxobo nezitho ezabelwana ngazo. Amawele ahlangene ajwayelekile kakhulu, azalwa kuphela ku-200,000 abazalwa ngokuzalwa.
Izimbangela ze-Monozygotic Twinning
Akukwaziwa ukuthi kubangelwa ukujibilika kwe-monozygotic , ngakho-ke, akekho oqiniseka ngokuqinisekile ukuthi yini ebangelwa i-twinning ehlangene.
Nakuba kunezinkolelo zokuchaza ukuthi amawele e-conjoined akha kanjani, kukhona ukungaqiniseki okukhulu mayelana nesizathu esiqondile. Asikho isizathu esicacile sokuchaza ukuthi kungani amaqanda athile ahlwanyelwe, ekhula abe abantu ababili. Futhi ayikho incazelo yokuthi kungani ukuhlukaniswa kuzobe kubambezeleka noma kungaqedi, okuholela emawele ahlangene.
Ukuvuthwa okuhlangene akukwazi ukuthi kubangelwa izakhi zofuzo, ukuziphatha komama, ukuhlukunyezwa, igciwane, ukugula, izinkinga zemvelo noma ezinye izici ezaziwa ngalesi sikhathi.
Njengoba engazi ukuthi yini ebangela isimo esiveza amawele ahlangene, akukho ndlela eyaziwayo yokuvimbela ukuthi ingenzeki. I-twinning ye-Monozygotic - ne-twinning ehlangene - ihlale ingumcabango ongacacisiwe.
> Imithombo:
Spencher, R. "I-embryology yama-theoretical and analytical of twins ehlangene: ingxenye I: embryogenesis." I-Anatomy Clinic , Umq. 13, Issue 1, 2000, isb. 36-53.
U-Quigley, uC. Amathenda Ahlangene: I-Historical, Biological and Ethical Issues Encyclopedia, McFarland & Company (2003).
Amaqiniso ngamawele ahlangene. Isikhungo Sezokwelapha sase-University of Maryland. http://umm.edu/programs/conjoined-twins/facts-about-the-twins.