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ABNORMALITIES OF
UMBILICAL CORD INSERTION
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- Importance of identification
of placental insertion of the umbilical cord.
- High rate of fetal complications
associated with abnormal insertion.
- Important for
percutaneous umbilical sampling.
- Twin pregnancy
(prevalence of velamentous insertion is greater in twins)
- 8.7% overall.
- 13% of monochorionic
twins.
- 3% in separate
dichorionic diamniotic twins.
- 1.1% in singleton
pregnancies.
Velamentous insertion is also thought to play a role in the
causation and management of twin-twin transfusion
syndrome.
- Importance of identification of
fetal insertion of the umbilical cord is to differentiate normal physiological bowel herniation into
the base of the umbilical cord from umbilical cord hernias, omphalocele
and gastroschisis.