An unusually echogenic fetal pericardium was visualized using ultrasound at
21 weeks' gestation. Serial prenatal examinations revealed its progressive
, spontaneous resolution. Follow-up examinations of the newborn and infant
failed to demonstrate any clinical or echocardiographic abnormality. The oc
currence of this unusual pericardial abnormality and its transient nature s
hould be considered during sonographic examination of the fetus.