May 28th, 2018

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Nuchal Cord Encirclements and Birth Weight
Authors:  J. Christopher Carey, M.D., and William F. Rayburn, M.D.
  OBJECTIVE: To determine if the presence of a single or multiple nuchal cord encirclement has a negative effect on fetal growth.

STUDY DESIGN: Data were retrieved from consecutive deliveries at our institution between January 1991 and December 1996. Our computerized database included live-born single and multiple births with a birth weight of ?300 g. ANOVA and multiple linear regression were used for statistical analysis.

RESULTS: Among the 13,256 deliveries, a single nuchal cord encirclement was observed in 3,250 (24.5%), and multiple encirclements were present in 504 (3.8%). There was no association between the diagnosis of growth restriction and the presence of a cord encirclement. The mean birth weight was no different in the presence of a single or multiple nuchal cord encirclement than with no encirclement (3,206 g or 3,135 g vs. 3,252 g; F=.08, P=.7). After controlling for substance abuse, medical or obstetric complications, race, infant sex, congenital anomalies and gestational age, there was no effect of a single or multiple cord encirclement on mean birth weight.

CONCLUSION: Birth weight is unaffected by a single or multiple nuchal cord encirclement. (J Reprod Med 2003;48:460-462)
Keywords:  umbilical cord, birth weight, nuchal cord
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