Hello po! MD here. If u perform NIPT, as early as 10 weeks malalaman npo since chromosome po ang chinecheck. but if through ultrasound earliest possible po ay 14 weeks. Though the higher the week, the more accurate. Pero mdmi pdn pong factors like position ni baby and development. To be sure po 18-20weeks po kayo magpaultrasound.
pwede na po depende sa pwesto ni baby