Lokho lokhu - i-fetus ye-TVP - wonke umama wesikhathi esizayo uzothola ngesikhathi sokukhulelwa kusukela kweshumi nanye kuya kwesonto leshumi nane. I-TV ye-Fetal iyingxenye yesibalo se-occipital. Ukusebenzisa i-ultrasound, ukuqina kwendawo emkhatsini wesikhumba kanye nezicubu ezithambile zentanyeni ye-fetal kunqunywa. Ukwanda kwale ndawo kubonisa ukuthuthukiswa kwezidakamizwa zofuzo. Umkhuba we-TVP wesisu ngeviki uboniswa etafuleni elingezansi.
Kanye ne-TB ye-fetal emasontweni angu-12 ku-ultrasound anquma ukuthi kukhona khona amathambo emisipha, okuyinto, ngokuthuthukiswa komzimba wesisu, okufanele ikhule kuze kube sesonto leshumi. Njengoba izingane ezine-chromosomal pathologies ossification zenzeka kancane kancane, ukungabi khona kwethambo lomzimba ongasetshenziswa kungabuye kubonise lesi sifo.
| Isikhathi sokukhulelwa, amasonto. | Ubukhulu besikhala sekhalenda, mm | ||
|---|---|---|---|
| 5th percentile | I-50th percentile | I-95th percentile | |
| Amaviki ayishumi. Izinsuku ezingu-2 - amasonto angu-10. Izinsuku ezingu-6 | 0.8 | 1.5 | 2.2 |
| 11ed. Izinsuku ezingu-2 - amasonto angu-11. Izinsuku ezingu-6 | 0.8 | 1.6 | 2.2 |
| Amaviki angu-12. Izinsuku ezingu-2 - amasonto angu-12. Izinsuku ezingu-6 | 0.7 | 1.6 | 2.5 |
| Amaviki angu-13. Izinsuku ezingu-2 - amasonto angu-13. Izinsuku ezingu-6 | 0.7 | 1.7 | 2.7 |
Ngezinsuku emva kwesonto leshumi nane, kunzima kakhulu ukucacisa lesi sifo, ngoba isimiso se-lymphism siqala ukusebenza emntwaneni kanye nokungena ngokweqile kwamanzi.
Ukwandiswa kwe-TBE ebusweni
Ukwandisa i-TBE ebusweni kubonisa ukugula okufana ne- Down syndrome . Ukuze unqume lokhu kuhlaselwa okuthile, lolu cwaningo luyenziwa. Ukuze ubone ukuthi kunezinye izifo ezingezansi zofuzo, yenza ukuhlolwa okugcwele kwe-ultrasound.
Abesifazane abakhulelwe abaneminyaka engamashumi amathathu nesishiyagalombili banomngcipheko wokuba nengane enezifo zofuzo. Ngakho-ke, odokotela bahlale bekhuthaza ukuthi bahlaselwe isifo sokubeletha ukuze baqiniseke ukuthi i-TVP ye-fetus ijwayelekile. Ngokusho kwedatha yemininingwane, ingozi yokwanda kwe-TBC ebusweni kwabesifazane abakhulelwe ineminyaka engamashumi amathathu nanhlanu ubudala ngo-1: 1350, kwabesifazane emva kweminyaka engamashumi amathathu nanhlanu ubudala yi-1: 1380, nakwabesifazane abangaphezu kwamashumi amane, 1: 100.