[Fetal megalosomia: clinical and prognostic value of main risk factors].

Fetal megalosomia associates with an increased risk of maternal and perinatal pathology. However it is right to make a clear distinction between "physiologic" megalosomia, expression of a high genetic potential of growth from the fetus, and megalosomia referable to any maternal pathology. While the first one entails problems of obstetric management at the most, the second one compels to take measures in order to reduce its incidence. A sample of 45 fetuses with megalosomia was studied retrospectively and compared with a standard sample, randomly selected among the fetuses, term delivered, who in the same period considered (January 1990-January 1994) weighed less than 4 kg at birth. This was done in order to verify which of the risk factors of fetal megalosomia reported in the medical literature affects the most the people who address our Institute. Important risk factors resulted, besides maternal height and postdatism, pre-gestational overweight and obesity. The prognostic significance of the factors, such as advanced maternal age, multiparity, male sex of the unborn child, excessive maternal weight gain during pregnancy, previous megalosomia, was of more difficult interpretation. In our experience, gestational diabetes didn't play the role, universally recognized to it, of the most important risk factor of fetal megalosomia.