The following extracts from medical publications are provided for the information of doctors, consultants, midwives, sonographers, and radiologists to aid with the diagnosis of twin to twin transfusion syndrome.
Abdominal examination shows tense polyhydramnios.
Monochorionicity is most accurately diagnosed in the first trimester by the lack of chorion between the two amniotic sacs of the two twins. It can be difficult to visualise the intertwin membrane, such that TTTS is sometimes misdiagnosed as monoamniotic twins. The recipient twin may show signs of hydrops, although less commonly the donor twin may also become hydropic. The recipient often has an enlarged heart with a thickened poorly contractile myocardium. St. George's London Ultrasound obstet.