from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Sharing the same amniotic sac within their mother's uterus.
Selective bipolar umbilical cord cautery and transection of anomalous parabiotic twin The patient was a 33-year-old, second pregnancy, referred at 21 weeks gestational age for pregnancy complicated by a monochorionic, monoamniotic (single shared placenta, single shared amniotic sac) twin pregnancy, with one twin reported to have multiple congenital anomalies.
Twin Reversed Arterial Perfusion Sequence in monoamniotic (single, shared amniotic sac) gestations requires occlusion and division of the cord due to the risk of cord entanglement.
High-resolution ultrasound confirmed monoamniotic twins.
The docs thought the babies might be monoamniotic, floating around in the same amniotic sac which causes twin-to-twin transfusion syndrome, with a risk of one or both babies being lost during pregnancy or at birth.