Two reports from the International Fetal and Newborn Growth Consortium for the 21st Century provide universal, multiethnic growth standards for fetuses and newborns that complement the World Health Organization Child Growth Standards for children from birth to age 5 years.
In the Fetal Growth Longitudinal Study, researchers collected fetal growth and newborn size data from 8 different urban populations of infants born to 4607 healthy, well-nourished women in Brazil, China, India, Italy, Kenya, Oman, the United Kingdom, and the United States. Ultrasound scans were performed every 5 weeks from 14 weeks of pregnancy to delivery to assess head circumference, biparietal diameter, occipitofrontal diameter, abdominal circumference, and femur length (Papageorghiou AT et al. Lancet. 2014;384:869-879).
Friedrich MJ. International Standards for Newborn Size and Fetal Growth. JAMA. 2014;312(15):1503. doi:10.1001/jama.2014.13252