Predisposing factors of unresolved gestational hydronephrosis among pregnant women

ABSTRACT
Background. Gestational hydronephrosis is due to compression of upper urinary tracts resulting from uterine enlargement. Recognition of the predisposing factors would help to reduce the burden of the issue.
Objective. In this study, the various factors of maternal hydronephrosis among pregnant women were assessed.
Materials and Methods. In this prospective cohort, 105 consecutive pregnant women were assessed in an 18-month period of time for occurrence and severity of hydronephrosis and contributing factors were determined.
Results. In this study, 83.8% had gestational hydronephrosis that was alleviated in 76.1% in postpartum phase. Myoma, gestational diabetes mellitus, and twin pregnancies were related to both more occurrence and less improvement of hydronephrosis; however, high gravid was only related to less improvement of gestational hydronephrosis (p < 0.05).
Conclusions. Approximately, 4/5 of pregnant women experience gestational hydronephrosis that is alleviated in 3/4 of the cases in the postpartum phase. It is multifactorial and in high-risk women such as those with high gravid, twin pregnancy, gestational diabetes mellitus, and myoma, further screenings and cautions are required.