Ultrasound examination in early pregnancy has steadily gained importance and is now routine for most women in the first trimester. The sonographic features of early trisomy 7 pregnancies are not well characterized. We present a case of trisomy 7 in which early pregnancy ultrasound revealed a gestational sac featuring cystic spaces and no visible embryo. Based on comparison with a previously reported case of trisomy 7 featuring a multicystic anembryonic gestational sac we suggest that this ultrasonographic finding may be a sign of trisomy 7.
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