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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

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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