Amawele angabelana nge-placenta noma ngamunye abe neyakhe
Uma amawele noma i-multiples ezalwa, ingane ngayinye inesidingo esifanayo se-oksijini, izakhi, nokususwa kwemfucuza. Ingabe ingane ngayinye ithola i-placenta yayo, noma kunjalo? Impendulo ayilula futhi incike ezinhlobonhlobo ezimbalwa.
I- placenta iyisici esibalulekile. Ngesikhathi sokukhulelwa, umsebenzi wayo ukuhlinzeka ingane nge oxygen nezakhi. Ibuye isuse imfucuza. I-placenta yakha eceleni kodonga lwamazinyo womama futhi ixhuma emntwaneni nge-cord umbilical.
Ngezimpande, inani lama-placentas lingashintsha. Kungaba nama-placentas amaningi, eyodwa ngomntwana, noma i-placenta eyodwa eyabelwe izingane. Inani le-placentas lingaba inkomba yezinsana zamawele , igama elibhekisela ekuthuthukiseni iqanda elifanayo noma emaqanda ahlukene.
I-Placentas emibili yamawele omndeni
Amawele e-Dizygotic noma amazwe angamazwe azohlale ephethe ama-placentas amabili. Ebizwa nangokuthi "amawele" amawele noma "amanga" amanga, izingane ziyingqayizivele njengezinye izihlobo.
Amawele we-Dizygotic ahlanganiswa nokuhlanganiswa kwamaqanda amabili ahlukene kanye nesidoda ezimbili. Kulokhu, umbungu ngamunye uzokuthuthukisa i-placenta yayo.
Ngezinye izikhathi, noma kunjalo, ama-placentas akhula eduze angase ahambe noma aqhubeke. Lokhu kungase kubonakale kuyisitho esisodwa uma kubhekwa yi-ultrasound. Eqinisweni, i-Minnesota Center for Twin & Family Research ithi amawele angamalungu afanayo futhi afana nawo avame ukungaziwa kahle futhi lokhu kudideka ngokuvamile kuyisici.
I-Placentas ihluke ngokuphindaphindiwe okufanayo
Ama-monozygotic noma amawele afanayo (futhi abizwa ngokuthi ama- twins "angokoqobo") angaba nama-placentas ngabanye noma abelwe ngakho, ngakho inani le-placentas lingashintsha. Izimpande ze-Monozygotic zivela eqanda elilodwa kanye neyododa inhlanganisela ehlukanisa emva kokukhulelwa. Uma ukuhlukaniswa kwenzeke ngokushesha-kungakapheli izinsuku ezimbalwa emva kokukhulelwa-bayoba njengamawele e-dizygotic, ahlwanyele ngokwahlukene esibelethweni futhi athuthukise ama-placenta ahlukene.
Kodwa-ke, uma ukuhlukaniswa kubambezeleka izinsuku ezimbalwa, imibungu izokhula nge-placenta eyodwa, eyabelwe. Ezimweni eziningi, lezi ziphindaphindwe zizofakwa ngaphakathi kwekhariyali ehlanganyelwe (ungqimba lwangaphandle lwesaka eliqukethe ingane). Iningi lizokhula ngaphakathi kwamanye amnions (i-membrane yangaphakathi ehambisana ne-sac yamniotic fluid). Igama elithi monochorionic-diamniotic (MoDi) lisetshenziselwa ukuchaza lesi simo.
Izintathu kanye Nezinye
Uma kwenzeka izintathu (kanye nezinye izimpande ezingaphezu kwamawele), imibungu ingase ifake ngezindlela eziningi. Njengamawele, bonke bangabelana nge-placenta futhi babe monochorionic.
Kungenzeka futhi ukuba umbungu owodwa ube ne-placenta ehlukile kanti amanye amabili ahlanganyela eyodwa. Lokhu kubizwa ngokuthi i-dichorionic kanye nezinsana ezihlanganyela i-placenta zingase zifanane ngenkathi enye ingane engekho.
Lapho ingane eyodwa ngayinye inama-placenta yawo, igama elithi trichorionic lisetshenziswa. Ngokufanayo, uma izingane ezine zine-placenta yazo, iyaziwa ngokuthi i-quadchorionic, njalonjalo.
Izinkinga ezingenzeka
Amawele e-Monochorionic angase abe engozini ye- twin-to-twin syndrome syndrome (TTTS). Lokhu kwenzeka kuma-20 amaphesenti amawele e-monochorionic.
Kulesi simo, imithwalo yegazi ivumela ukugeleza kwegazi okungalingani kuya emawele amabili.
Iwele elilodwa liye lahlehla ukugeleza kwegazi, ukukhula okusheshayo, kanye namanzi amniotic amancane. Amanye amawele anegazi lokugeleza ngokweqile kanye namanzi amniotic amaningi, okungabangela ukucindezeleka kwenhliziyo. Lesi simo singakwazi ukuphathwa futhi ukuhlinzeka laser kwenziwa kwezinye izimo.
Ngokuvamile, amawele e-monozygotic ahlukanisa isonto noma ngaphezulu ngemuva kokukhulelwa futhi athuthukise nge-placenta ne-chorion kuphela kodwa equkethe ngaphakathi kwe-amnion eyodwa. I-monoamniotic-monochorionic (ama-MoMo) amawele avela ngaphansi kwama-1 amaphesenti amawele okubeletha.
Lolu hlobo lokukhulelwa kumele luhlolwe ngokucophelela. Amawele asengozini yokungena kwetambo, ukucindezela intambo, nezinye izinkinga.
Lokhu kungenxa yokuthi yilowo nalowo unezintambo zomzimba kodwa kukhona esakeni elifanayo le-amniotic, elivumela ukuba lihlangane futhi mhlawumbe lilimale.
Izwi elivela ku-Verywell
Ukukhulelwa kuza nemibuzo eminingi futhi eyodwa ehilela izimpande iza nokunye okuningi. Ukwazi ukuthi uhlelo lwe-placenta lwezingane zakho lusebenza kanjani kunalokho lunentshisekelo. Hlala ukhumbula ukuthi ngezinye izikhathi i-ultrasound ingakhohlisa.
> Imithombo:
> Benirschke K, uKaufmann P. P athology ye-Human Placenta . Berlin: Springer Science & Business Media, 2013.
> I-Minnesota Centre yeTwin kanye noCwaningo lweMndeni. I-MTFS Twin Info nemibuzo evame ukubuzwa. University of Minnesota. 2007.