Association of sex of the fetus in isolated fetal choroid plexus cysts.

We sought to determine if an association exists between sex of the fetus and the finding of isolated fetal choroid plexus cysts. Of 131 fetuses, 62 were male (47.3%) and 69 were female (52.7%). No statistically significant differences were found in the maternal demographic parameters studied (age, race, gravidity, parity, sonogram timing) or descriptive cyst information obtained (location, number, dimensions, resolution), although bilaterality was more common in male fetuses. The determination that isolated choroid plexus cysts are seen equally frequently in male and female fetuses adds to basic information about such a common sonographic finding. KEY WORDS: Choroid plexus cyst; Cyst, choroid plexus; Ventricles, lateral.