Symptoms

Fetal macrosomia can be difficult to detect and diagnose during pregnancy. Signs and symptoms include:

• Large fundal height. During prenatal visits, your health care provider might measure your fundal height — the distance from the top of your uterus to your pubic bone. A larger than expected fundal height could be a sign of fetal macrosomia.

• Excessive amniotic fluid (polyhydramnios). Having too much amniotic fluid — the fluid that surrounds and protects a baby during pregnancy — might be a sign that your baby is larger than average.

  The amount of amniotic fluid reflects your baby's urine output, and a larger baby produces more urine. Some conditions that cause a baby to be larger might also increase his or her urine output.