THERAPEUTIC CLASS
SMFM Consult Series #46: Evaluation and management of polyhydramnios
Polyhydramnios, or hydramnios, is an abnormal increase in the volume of amniotic fluid. Identification of
polyhydramnios should prompt a search for an underlying etiology. Although most cases of mild polyhydramnios
are idiopathic, the 2most common pathologic causes arematernal diabetes mellitus and fetal
anomalies, some of which are associated with genetic syndromes. Other causes of polyhydramnios
include congenital infection and alloimmunization. The purpose of this document is to provide guidance on
the evaluation and management of polyhydramnios.
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