Vanishing Twin NIPT Timing Calculator

Estimate how strongly a vanishing twin may still interfere with an NIPT result based on timing, gestational age, and what was seen on ultrasound.

A vanishing twin can affect NIPT. This tool estimates interference concern, not whether an NIPT result is correct.
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Methodology

The result combines elapsed time, gestational age, and vanishing-twin type. It uses concern levels because current studies do not support an exact personal false-positive percentage.