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==General== | ==General== | ||
Associations: | |||
*Associated with congenital abnormalities, esp. cardiac - '''key point'''.<ref name=Ref_WMSP464>{{Ref WMSP|464}}</ref> | *Associated with congenital abnormalities, esp. cardiac - '''key point'''.<ref name=Ref_WMSP464>{{Ref WMSP|464}}</ref> | ||
**Thought to be an acquired defect (as prevalence is lower early in gestation). | **Thought to be an acquired defect (as prevalence is lower early in gestation). | ||
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*Associated with maternal [[diabetes]].<ref name=pmid7997408>{{cite journal |author=Lilja M |title=Infants with single umbilical artery studied in a national registry. 3: A case control study of risk factors |journal=Paediatr Perinat Epidemiol |volume=8 |issue=3 |pages=325–33 |year=1994 |month=July |pmid=7997408 |doi= |url=}}</ref> | *Associated with maternal [[diabetes]].<ref name=pmid7997408>{{cite journal |author=Lilja M |title=Infants with single umbilical artery studied in a national registry. 3: A case control study of risk factors |journal=Paediatr Perinat Epidemiol |volume=8 |issue=3 |pages=325–33 |year=1994 |month=July |pmid=7997408 |doi= |url=}}</ref> | ||
====Image | ==Gross== | ||
*Two vessels in the umbilical cord. | |||
==Microscopic== | |||
*Two vessels in the umbilical cord - one artery and one vein. | |||
===Image=== | |||
<gallery> | <gallery> | ||
Image:Single_umbilical_artery,_HE..jpg | Single umbilical artery. (WC/Patho) | Image:Single_umbilical_artery,_HE..jpg | Single umbilical artery. (WC/Patho) |
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