This study is a retrospective chart review of women who were delivered
at term at the OU and who received a growth ultrasound in the late third
trimester, defined as 34w0d to 36w6d. The charts of 1070 women who
delivered from the years 2019-2021 were included for analysis. The
estimated fetal weight at the time of delivery was calculated using the
formula of 30 g/day of fetal growth from the time of their recent
ultrasound and this mean was compared to the mean birth weight. The
primary outcome is mean difference between these values. Secondary
outcomes include the sensitivity/specificity of detecting small for
gestational age infants and large for gestational age infants. Several
subgroups were additionally analyzed such as patients with morbid
obesity, diabetes, ethnicity, advanced maternal age > 40 years old,
and fetal growth restriction. Our exclusion criteria includes patients
with poor dating, fetal anomalies, and multiple gestations.