Early diagnosis of FGR is very important, because it enables the identification of the etiology of the condition and adequate monitoring of the fetal status, thereby minimizing risks of premature birth and intrauterine hypoxia.

Fetal macrosomia is defined as birth weight >4000 g and is associated with several maternal and fetal complications such as maternal birth canal trauma, shoulder dystocia, and perinatal asphyxia. Early identification of risk factors could allow preventive measures to be taken to avoid adverse perinatal outcomes. Prenatal diagnosis is based on two-dimensional ultrasound formulae, but accuracy is low, particularly at advanced gestation. Three-dimensional ultrasound could be an alternative to soft tissue monitoring, allowing better prediction of birth weight than two-dimensional ultrasound. In this article, we describe the definition, risk factors, diagnosis, prevention, ultrasound monitoring, prenatal care, and delivery in fetal macrosomia cases.

The intracranial structure volumes assessed by 3D sonography using the extended imaging virtual organ computer-aided analysis method were reduced in fetuses with growth restriction (estimated weight <3rd percentile).

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