Acute progression of a unilateral fetal ovarian cyst to complex bilateral. cysts causing acute polyhydramnios

In recent years, fetal ovarian cysts have been diagnosed more frequently because of improved prenatal sonographic techniques. These cysts vary in size, can be simple or complex, and are commonly unilateral. Intrauterine complications such as torsion and rupture may occur, and treatment options vary from conservative management to antenatal aspiration, early delivery; and neonatal surgery. We report the case of a unilateral, complex fetal ovarian cyst that progressed rapidly to bilateral complex cysts and was accompanied by acute onset of severe polyhydramnios. Such symptoms represent a considerable potential risk for bilateral ovarian loss. We are unaware of any previously published reports of such progression.