Outcome of pregnancy in women diagnosed with idiopathic polyhydramnios

Polyhydramnios is present in approximately 2 % of pregnancies and has been associated with a variety of adverse pregnancy outcomes. The aim of our study was to evaluate the association between polyhydramnios and adverse pregnancy outcomes. This was a retrospective case control study of 288 singleton pregnancies delivered in Rotunda Hospital Dublin between 2013and 2014. Polyhydramnios was defined as i) AFI ≥ 25cm ii) maximal vertical pocket (MVP) of ≥ 8cm. and iii) a gestational age specific threshold for AFI. Demographic information obstetric and neonatal outcomes were obtained by review of hospital databases. Exclusion criteria included gestational or pre-existing diabetes multiple pregnancies a fetus with structural or chromosomal abnormalities Rhesus isoimmunisation TORCH screen positive. Outcomes were compared with outcomes of singleton pregnancies without polyhydramnios. A total of 8798 deliveries occurred during the study period. The frequency of polyhydramnios was 1.6%. One hundred and forty four women formed study group and 144 women with normal amniotic fluid were matched as the control group.