A non-systematic search in the PubMed was undertaken using terms "birthweight" combined with "gestational age," "menstrual dating," "ultrasound dating," "estimated fetal weight," "customized growth charts," "malformation," "stillbirth," "family influence," and "individualized BW ratio," respectively.
Estimation of gestational age by early ultrasound reduces estimated gestation age in comparison to menstrual dating. Clinically, use of early ultrasound dating instead of menstrual dating is recommended, unless ultrasound is not available [8].