Twin reversed arterial perfusion sequence (TRAP sequence), also known as acardiac twinning, is a rare condition that occurs in pregnancies of identical twins that share one placenta.
TRAP sequence occurs in 1 in 35,000 pregnancies overall. In TRAP sequence, one twin is developing normally while the other develops without a functioning heart and other body parts such as a head, arms or legs.
The goal of prenatal care is to minimize the risk of heart failure for the normally developing twin. Sadly, the other twin will not survive after birth since it does not have a functioning heart. Our Fetal Concerns Center will assess your pregnancy and work with you to develop a plan for your pregnancy which could include surgery, medication or other treatments.