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The recurrent true umbilical cord knots: a case report

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Author(s): Keypour F | Naghi I

Journal: Tehran University Medical Journal
ISSN 1683-1764

Volume: 70;
Issue: 8;
Start page: 520;
Date: 2012;
Original page

Keywords: fetal movement | genetics | true knots | umbilical cord

ABSTRACT
Background: True umbilical cord knot is one of the abnormalities of the umbilical cord. Active fetal movements create cord knotting. True umbilical cord knots are rare but may be associated with fetal distress and stillbirth. True umbilical cord knots are capable of impeding blood flow to the fetus.Case presentation: A 26-year old primigravid woman was first treated for genital herpes simplex virus (HSV type 2) at 36 weeks of gestational age. She received oral acyclovir (400 mg three times daily for 10 days). At the gestational age of 38 weeks and 5 days, fetal activity decreased and NST was nonreactive. She was delivered by cesarean section and a true umbilical cord knot was found. Four years later, in her second pregnancy, another true knot was seen.Conclusion: Excessively long umbilical cords are more likely to be associated with true knots. Genetics has an important role in determining cord length and occurrence of true knots.
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