The outcome of isolated fetal ascites

ObjectiveTo describe the outcome of pregnancies complicated by isolated fetal ascites.Study designThis is a review of 12 cases of isolated fetal ascites managed at the fetal medicine unit at the Royal Victoria Infirmary in Newcastle. The work-up for ascites included detailed ultrasound examination, checking maternal blood group and testing for the presence of antibodies, as well as maternal infection screening and fetal karyotyping.ResultsTen out of the 12 pregnancies had a viable fetal outcome, with two babies (20%) requiring further bowel surgery. Ascites resolved spontaneously in three pregnancies (30%) antenatally and in two babies (20%) few weeks after delivery.ConclusionIsolated fetal ascites with normal karyotype and negative infection screen carries a good prognosis, with spontaneous resolution in most of the cases. However the parents should be counselled as regards the possibility of need for surgery or the presence of underlying syndromes.