If blood sugar is a bit high during pregnancy, what kind of malformations might the fetus have?

Patient's question:

No

Doctor's answer:

The main consequences of gestational diabetes are fetal overgrowth, which may lead to hypertension, preeclampsia, and urinary tract infections. It may also result in miscarriage, stillbirth, and congenital malformations. It is recommended that you undergo insulin therapy.