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Causes of anembryonic pregnancy
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Causes of anembryonic pregnancy

An anembryonic pregnancy or blighted ovum is a common type of miscarriage caused by an early pregnancy failure.

A blighted ovum can be diagnosed as early as on the 7th week of pregnancy, when the gestational sac appears empty on an ultrasound scan, and no fetal heartbeat can be seen. However, the sac continues secreting hCG hormone, and that's the reason why a pregnancy test is still positive.

By BSc, MSc (embryologist) and BA, MA (fertility counselor).
Last Update: 01/29/2018