Marginal cord insertion

Marginal cord insertion is a type of abnormal cord insertion.

The estimated incidence is at ~7% 1 of singleton pregnancies but ~25% of twin pregnancies. Hence, it is very important to locate the umbilical cord in all patients, particularly in high-risk pregnancy.

In this situation, the cord insertion is too close to the placental margin (usually defined as <2 cm 5 although some references define it as <1 cm 3,6)

Some authors state that there is no increased risk 5.

Progression into a velamentous cord insertion as a result of "placental trophotropism" can be seen in later stages of pregnancy. Second-trimester marginal cord insertion can be associated with increased likelihood for low birth weight, pre-term delivery and composite adverse obstetrical and neonatal outcomes 8.

Ultrasound - obstetric
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Article information

rID: 13468
System: Obstetrics
Synonyms or Alternate Spellings:
  • Marginal cord insertion (MCI)
  • Battledore placenta
  • Battledore cord insertion

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