Interpretation
Our finding that male fetuses are larger than female fetuses at any gestational age is consistent with reported literature.9, 13 It is not surprising that female fetuses in our cohort were significantly more likely to be considered SGA and less likely LGA than male fetuses by the sex-neutral fetal growth standard. Given the commonplace use of sex-specific neonatal growth charts, it is noteworthy that sex-neutral intrauterine growth standards still predominate.10, 12, 19 A notable exception is the growth standard published by the World Health Organization (WHO), which also demonstrated significant differences between sexes but does not have a readily usable percentile formula for clinical use.13