Polyhydramnios associated with rare genetic syndromes: two case reports.

Background: We present two genetic causes of polyhydramnios that were challenging to diagnose due to their rarity and complexity. In view of the severe implications, we wish to highlight these rare genetic conditions when obstetricians consider differential diagnoses of polyhydramnios in the third trimester.

Case Presentation: Patient 1 is a 34-year-old Asian woman who was diagnosed with polyhydramnios at 28 weeks' gestation.