COMPARISON BETWEEN SECOND AND

THIRD TRIMESTER OLIGOHYDRAMNIOS

	Second Trimester	Third Trimester
% fetal anomalies (1) % survival Anomalous fetus Premature rupture of membranes IUGR Abruption Idiopathic	50.7% 10.2% Most frequent cause Second most common Less common cause Less common cause Uncommon	22.1% 85.3% Frequent cause Less frequent Frequent cause Rare Most common cause

REFERENCES

1. Shipp TD, Bromley B, Pauker S et.al. Outcome of singleton pregnancies with severe oligohydramnios in the second and third trimesters. Ultrasound Obstet Gynecol 1996;7:108-113.