Not obese: 1.79 hours (5th, 95th percentile,
Labor curves did not differ between LGA and AGA
for the following
Labor onset (nonaugmented spontaneous labor vs
Pregestational DM or gestational diabetes
Authors acknowledge study limitations including that study can address associations and not causality
Women with LGA infants take longer to reach the second stage of labor vs AGA
The difference greatest in nulliparous and obese women once in the active phase of labor (6-10 cm)
Labor onset and the presence of diabetes or gestational diabetes do not seem to affect the duration of the first stage of labor after 3-cm cervical dilation
Authors suggest based on data in this study
Obesity results in delay through stage 1 because greater adipose tissue deposits in the pelvis and weaker contractions
Metabolic DM effects seem less likely to alter labor curve patterns
Authors recommend further studies that will incorporate the following
Use EFW to identify macrosomia “…because this would provide greater clinical insight into anticipated labor progression, influence prospective labor management in cases of suspected fetal macrosomia, and enable comparison with our labor curves that were constructed from postnatal infant birthweight”
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