Oligohydramnios during the Early Second Trimester

Oligohydramnios developing early in pregnancy is less common, and the fetal outcomes are usually poor. This is because prolonged decrease in amniotic fluid may cause compression sequences, such as pulmonary hypoplasia, muscle hypotrophy or joint constriction. Early-onset oligohydramnios may be caused by preterm premature rupture of membranes (pPROM) or decreased secretion of amniotic fluid. Early rupture of membranes always leads to poor prognosis despite antepartum intervention such as amnioinfusion. Oligohydramnios without ruptured membranes implies fetal urinary tract malformations or chromosome anomaly. However, even normal infants may suffer from the consequences of oligohydramnios, such as amniotic band syndrome, congenital postural deformities, pulmonary hypoplasia and cord compression. Decades THE EXPERIENCE OF AMNIOINFUSION FOR OLIGOHYDRAMNIOS DURING THE EARLY SECOND TRIMESTER