Threatened miscarriage
Last revised by Jeremy Jones on 20 Sep 2021
Citation, DOI, disclosures and article data
Citation:
Gaillard F, Bell D, Iqbal S, et al. Threatened miscarriage. Reference article, Radiopaedia.org (Accessed on 10 Oct 2024) https://radiopaedia.org/articles/2174
DOI:
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rID:
2174
Article created:
Disclosures:
At the time the article was created Frank Gaillard had no recorded disclosures.
View Frank Gaillard's current disclosures
Last revised:
20 Sep 2021,
Jeremy Jones ◉
Disclosures:
At the time the article was last revised Jeremy Jones had no recorded disclosures.
View Jeremy Jones's current disclosures
Revisions:
13 times, by
11 contributors -
see full revision history and disclosures
Systems:
Synonyms:
- Threatened abortion
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.
On this page:
Epidemiology
It occurs in 20-25% of pregnancies and is associated with an increased rate of fetal loss (15-50%, compared to 2-7%).
Radiographic features
Ultrasound
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:
- fetal bradycardia: <80-90 bpm
- small mean gestational sac diameter
- large and calcified yolk sac of more than 7 mm
- small or irregular gestational sac: MSD/CRL <5 mm
- large subchorionic hemorrhage more than 2/3 of gestational sac
- expanded amnion sign (an abnormally large amniotic cavity)
- absent or poor decidual reaction
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Treatment and prognosis
Threatened miscarriage can go on to become any of:
- normal pregnancy ~50%
- inevitable miscarriage
- incomplete miscarriage
- complete miscarriage
- missed miscarriage
References
- 1. Weissleder R, Wittenberg J, Harisinghani MMGH et-al. Primer of Diagnostic Imaging. Mosby. (2007) ISBN:0323040683. Read it at Google Books - Find it at Amazon
- 2. Thilaganathan B. Obstetric ultrasound. Churchill Livingstone. ISBN:0443054711. Read it at Google Books - Find it at Amazon
- 3. Mouri M, Mouri HH, Mouri RT, Mouri. Threatened Abortion. (2020) . doi: - Pubmed
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