marginal cord insertion

Marginal cord insertion, also known as a 'battledore insertion', is a type of abnormal cord insertion.

Terminology

Insertion of the umbilical cord within <2 cm from the placental margin is described as marginal cord insertion (usually defined as <2 cm  although some references define it as <1 cm ). Whereas lateral insertion of the umbilical cord >2 cm from the placental margin is described as eccentric cord insertion.

Epidemiology

The estimated incidence is at ~7% 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.

Pathology

Associations

• monochorionic twins pregnancy
• intrauterine growth restriction (IUGR)
• preterm birth

Some authors state that there is no increased risk .

Treatment and prognosis

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.

Siehe auch:

• Zwillingsschwangerschaft
• Insertio velamentosa
• abnormal cord insertion

und weiter:

• obstetric curriculum
• placenta
• dichorionic diamniotic twin pregnancy
• velamentous cord insertion
• MCDA pregnancy
• monochoriale-monoamniote Zwillingsschwangerschaft
• variation in cord insertion