Fetal macrosomia

Clinical palpation, ultrasound biometry and maternal perception all can lead to the suspicion of a large-for-gestational-age fetus and fetal macrosomia. Although maternal diabetes and rare genetic syndromes may be the cause of large fetal size, most of these pregnancies will in fact be normal. Nevertheless, maternal and perinatal risks do increase with increasing fetal size. Antenatal prediction is, however, imprecise, and the evidence to date does not support intervention in non-diabetic pregnancies where there is a suspicion of fetal macrosomia.