Vanishing Twins Screening Negative Result
If you have a "vanishing twin" pregnancy, your prenatal screening test might have been a 11-14 week (nuchal translucency) ultrasound followed by Second Trimester Screening (STS). Or you might have had Second Trimester Screening (STS) on its own. Either way, your results are either "screen negative" or "screen positive".
Choose your result to learn more about what it means and next steps:
Screen Negative
A "screen negative" result means there that there is a lower chance for the pregnancy to have trisomy 21 (Down syndrome) or trisomy 18 (Edwards syndrome). A lower chance does not mean "no chance".
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Virtual educational sessions on prenatal screening and nuchal translucency quality assurance are available upon request for health‑care providers.