If you have gestational diabetes, your baby may be at increased risk of: - Excessive birth weight. Higher than normal blood sugar in mothers can cause their babies to grow too large. Very large babies — those who weigh 4kg or more — are more likely to become wedged in the birth canal, have birth injuries or need a C-section birth. - Early (preterm) birth. High blood sugar may increase women's risk of early labor and delivery before the due date. Or early delivery may be recommended because the baby is large. - Serious breathing difficulties. Babies born early to mothers with gestational diabetes may experience respiratory distress syndrome — a condition that makes breathing difficult. - Low blood sugar (hypoglycemia). Sometimes babies of mothers with gestational diabetes have low blood sugar (hypoglycemia) shortly after birth. Severe episodes of hypoglycemia may cause seizures in the baby. Prompt feedings and sometimes an intravenous glucose solution can return the baby's blood sugar level to normal. - Obesity and type 2 diabetes later in life. Babies of mothers who have gestational diabetes have a higher risk of developing obesity and type 2 diabetes later in life. - Stillbirth. Untreated gestational diabetes can result in a baby's death either before or shortly after birth.