![]() How is vanishing twin syndrome diagnosed? Research suggests that vanishing twin syndrome is more common among pregnant people over 30. Approximately 7% to 36% of IVF pregnancies involving multiples are diagnosed with VTS. As a result, people who are more likely to get an early ultrasound are more likely to learn that an embryo that was once present has disappeared.įor example, couples doing in vitro fertilization (IVF) may have an ultrasound as early as weeks six or seven of pregnancy. It’s hard to know just how common vanishing twin syndrome is because many people likely lose an embryo before their first pregnancy ultrasound. This absorption process is completely harmless. The vanishing twin’s tissue gets absorbed by the surviving embryo(s) and the parent, too. What happens when one twin absorbs another? ![]() With vanishing twin syndrome, a pregnancy involving twins or triplets becomes a pregnancy involving one less baby than was initially anticipated. The embryo stops developing, and its tissue gets absorbed by the mother, or gestational parent, and the surviving embryo(s). It occurs when an embryo detected during an ultrasound can’t be found on a future ultrasound. Vanishing twin syndrome is a type of miscarriage that can occur during multiple pregnancies (births involving twins or triplets).
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