Missed miscarriage

A missed miscarriage, sometimes termed a missed abortion 3, is a situation when there is a non-viable fetus within the uterus, without symptoms of a miscarriage.  

Radiographic features

Ultrasound

A crown rump length (CRL) of ≥7 mm without a heartbeat on a endovaginal ultrasound confirms the diagnosis.

Additional clues are presence of abnormal hyperechoic material within the uterine cavity and an irregular gestational sac.  

If there is an absence of the heartbeat in a fetus that is less than 7 mm, the diagnosis of miscarriage cannot be made with certainty. This scenario is termed "pregnancy of uncertain viability (PUV)", and follow up with ultrasound (generally in 7-10 days) and serial beta hCG levels recommended.


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Article Information

rID: 7233
System: Obstetrics
Section: Pathology
Synonyms or Alternate Spellings:
  • Missed Miscarriage
  • Missed abortion
  • Early fetal demise
  • Early intrauterine fetal demise
  • Early loss of pregnancy

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