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Threatened miscarriage

Last revised by Dr Jeremy Jones on 20 Sep 2021

Threatened miscarriage (or threatened abortion) is mainly a clinical term, used when a pregnant woman in first 20 weeks of gestation presents with spotting, mild abdominal pain and contractions, with a closed cervical os 3.

It occurs in 20-25% of pregnancies and is associated with an increased rate of fetal loss (15-50%, compared to 2-7%).

Cervix is closed, and there is a live intrauterine gestation.

In many cases, the ultrasound will be either completely normal, or with a subchorionic hemorrhage.

Some features suggestive of a poor outcome:

Threatened miscarriage can go on to become any of:

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