Amniocentesis in treatment of acute polyhydramniosis in twin pregnancies.

A rare complication in twin pregnancy is acute polyhydramniosis. If left untreated, the perinatal mortality is 100%. The clinical courses of two cases treated with ultrasound-guided amniocentesis are presented. In the first case altogether 4875 ml amniotic fluid was drained. Both twins died within the first 24 hours of life after delivery in gestational week 26. In the second case 2150 ml amniotic fluid was drained. Both twins survived and were delivered in good condition in gestational week 35. We recommend ultrasound-guided amniocentesis to be performed in twin pregnancy affected by acute polyhydramniosis.