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11 Nov 2004

Vanishing Twin Syndrome
I'm 7Weeks and 4 days pregnant I had my scan at 7weeks 1 day. I expected to be 7 weeks 4days when I had the scan but my dr said no its 7w1d. My gynae said I'm currently carrying twins. One had a heart beat of 163 the other was 156. He said the one looked smaller than the other therefore might vanish. My questions are

1. Is difference in size a good criteria to determine vanishing baby sysndrome.

2. Looking at the info above (timing + heartbeats) what are the chances of one twin vanishing? do I have the same chances as any other woman who is pg with twins.
Answer 349 views
Expert
GynaeDoc
gynaedoc

01 Jan 0001

You don't say what the sizes were. If there is a large difference in size, then there would be a risk of one twin not progressing. The difference in fetal hearts is not helpful in this regard. A difference of 3 days is within the limits of accuracy of ultrasound. So from the information you have given me, your chances of a vanishing
Best wishes
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