We offer sequential screening upto 20 weeks to rule out chromosomal anomalies such as trisomy 21,18 and 13. Dual marker and level 1 scan at 11-13 weeks. Followed by quadruple marker at 14-16 weeks. And then finally level 2 scan. If your pregnancy is high risk ( conceived after ivf, elderly age group) then it is mandatory. Otherwise it is optional.
Answered2022-04-03 12:39:49
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