Nowadays ultrasound scan often permits to diagnose
molar pregnancy before 12 weeks, showing a fine vascular
or honeycomb appearance. Later a complete mole
is characteristically described as snowstorm appearance
of mixed echogenicity, representing hydropic villi
and intrauterine hemorrhage. The ovaries often contain
multiple large theca-lutein cysts as a result of increased
ovarian stimulation by excessive beta-hCG (3).
Ultrasound diagnosis of partial mole is more difficult: the
fetus may be still viable, but may show signs consistent
of triploidy, such as unusually early growth restriction or
developmental abnormalities. There may be only scattered
cystic spaces within the placenta, and ovarian cystic