El ukuhlolwa kokubeletha okungahlaseli Kuwuvivinyo ngalo ukwazi ukubona izinguquko ze-chromosomal ku-DNA yengane ngegazi likamama. Inikeza ukwethembeka okungama-99% futhi Ayifaki ingozi kumama noma kumntwana, ukwazi ukusebenza kusukela evikini le-10 lokukhulelwa.
Ngokukhipha igazi elilula kumama, i-DNA yamahhala ejikeleza ku-plasma kamama ingatholwa. Ngakho-ke, ngobuchwepheshe bokulandelana nokuhlaziya okuthuthukisiwe kwe-bioinformatic, ivumela ukwazi ubulili bengane futhi ibone ukungahambi kahle kwe-chromosomal okungenzeka njenge-trisomy 21 (Down syndrome), i-trisomy 13 (i-Patau syndrome), i-trisomy 18 (ehlotshaniswa ne-Edwards syndrome) kanye nama-aneuploidies ahlotshaniswa nepheya lamakhromozomu ocansi.
Kufanele kwenziwe nini ukuhlolwa kokubeletha okungahlaseli?
Enye yezinzuzo ezinhle zokuhlolwa kwangaphambi kokubeletha okungahlanyisi ukuthi kungenziwa phakathi kwamaviki 9 ne-10 okukhulelwa. Ngaleso sikhathi, kufanele kube uchwepheshe we-gynecology oncoma ukusebenza kokuhlolwa kanye isikhathi esifanele sesiguli ngasinye, ngokomlando waso nezimo zokukhulelwa.
Ngaphezu kwalokho, njengoba kuwukuhlola okungamthinti umama noma umbungu, kungaba usizo olukhulu kunoma yimuphi owesifazane olindele umntwana, kungakhathaliseki ukuthi umbungu owodwa noma eminingi. Nokho, kuyi-a ukuhlolwa okunconyelwe ikakhulukazi abesifazane abaminyaka yabo yokubeletha ineminyaka engama-35 noma ngaphezulu, njengoba, lapho umama emdala, kuba sengozini enkulu yokuba umntwana ehlushwa inkinga yofuzo. Kubuye kunconywe kakhulu uma i-ultrasound ibonisa izinsolo zezinkinga zofuzo ku-fetus, uma umama esevele enenkinga yokuguqulwa kwe-chromosomal kwabanye abakhulelwe noma uma umama esevele enezinguquko zofuzo ezingase zithinte umbungu.
Ungayihumusha kanjani imiphumela yokuhlolwa kwangaphambi kokubeletha okungahlaseli?
Ukuhlolwa kokubeletha okungahlaseli ivumela ukuhlolwa nokutholwa kokungajwayelekile kwe-chromosomal yengane ngesikhathi sokukhulelwa. Ukuhlola okuhlasela kancane ozoqinisekisa ngakho ukuthi alukho uhlobo lwe-chromosomal engavamile, kodwa ungayihumusha kanjani idatha evela kulokhu kuhlolwa kwangaphambi kokubeletha?
Uma ukuhlolwa sekwenziwe, imiphumela ngokuvamile iba ezinsukwini ezingu-7-10. Kungaleso sikhathi lapho kungafinyelelwa khona iziphetho ngokusekelwe kudatha etholiwe. Khumbula ukuthi imiphumela yokuhlolwa iyinombolo futhi umphumela uzosuselwa kumaphesenti:
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- Ubungozi obuphansi noma obunegethivu: lapho ukuhlolwa kuyingozi noma iphansi, kusho ukuthi awekho amathuba okuthi kube noshintsho ku-chromosomal.
- Ingozi ephezulu noma enhle: Uma ukuhlolwa ku-positive, kuzodingeka kwenziwe ezinye izivivinyo zokuxilonga ozoqinisekisa ngazo ukuguqulwa kwe-chromosomal ngokuqiniseka.
- Akuphelele: ezikhathini ezimbalwa ukuhlolwa kokubeletha okungahlaseli akuhlanganisi. Uma kwenzeka lokhu, kuhle ukuphinda ukuhlolwa esikhathini esithile kamuva.