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Chorionic villus sampling is associated with normal fetal growth
Seventy-eight singleton term neonates, delivered of women who were 35 years of age or older after chorionic villus sampling at 9 to 11 weeks' gestation, were compared with 1335 singleton control neonates delivered at term of mothers 35 years of age or older before the clinical application of chorionic villus sampling at our institution. No statistically significant differences were found in birth weight, crown-heel length, or ponderal index between control neonates and neonates delivered after chorionic villus sampling. The sample sizes necessary to detect a 5% difference in population means at an alpha error level of 0.05 and beta error level of 0.1 were calculated for the measured variables and achieved before analysis. This study suggests that patients undergoing chorionic villus sampling are not at increased risk for the development of decreased fetal growth or intrauterine growth retardation.
Seventy-eight singleton term neonates, delivered of women who were 35 years of age or older after chorionic villus sampling at 9 to 11 weeks' gestation, were compared with 1335 singleton control neonates delivered at term of mothers 35 years of age or older before the clinical application of chorionic villus sampling at our institution. No statistically significant differences were found in birth weight, crown-heel length, or ponderal index between control neonates and neonates delivered after chorionic villus sampling. The sample sizes necessary to detect a 5% difference in population means at an alpha error level of 0.05 and beta error level of 0.1 were calculated for the measured variables and achieved before analysis. This study suggests that patients undergoing chorionic villus sampling are not at increased risk for the development of decreased fetal growth or intrauterine growth retardation.