vanishing twin syndrome is a "miscarriage that causes a pregnancy involving twins to become a pregnancy involving one embryo. It occurs when one of the embryos detected during an ultrasound stops ...
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What to Know About Twin Pregnancy
Medically reviewed by Monique Rainford, MDA twin pregnancy is when there are two fetuses in the uterus at the same time. Twins can be identical, meaning they developed when a single fertilized egg ...