Most instances of macrosomia are related to hyperinsulinism at some stage in fetal life. Whilst the most common occurrence is in association with overt maternal diabetes, hyperinsulinism sufficient to cause macrosomia may occur in mothers who are unusually tall or heavy before pregnancy, who have excessive weight gain during pregnancy, or who have a mild degree of gestational glucose intolerance that is short of the defined limits for gestational diabetes . Diagnosis and treatment, if needed, must rest with the obstetrician or pediatrician. In addition, I would suggest early screening for diabetes in the next pregnancy as well as serial ultrasound examinations to follow fetal growth.
Delivery can be very complicated for the macrosomic fetus.
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