QUESTION: My friend is 34 weeks pregnant and has gestational diabetes. Diet and exercise were not enough, so her doctor prescribed insulin. Will the diabetes continue after delivery? When should her glucose return to normal, and will her baby develop type 1 or type 2 diabetes?
Gestational diabetes often improves within hours or days after delivery because pregnancy-related insulin resistance falls rapidly when the placenta is delivered. However, it does not always disappear, and some women had previously unrecognized prediabetes or type 2 diabetes. She needs glucose monitoring after birth and a fasting 75-gram oral glucose tolerance test 4–12 weeks postpartum. Her baby will not automatically develop diabetes, but may have low glucose shortly after birth and a higher long-term risk of obesity and type 2 diabetes.
Answer by Dr. Albana Greca, MD, MMedSc
Gestational diabetes develops when pregnancy hormones increase insulin resistance and the pancreas cannot make enough additional insulin. Needing insulin during pregnancy does not mean that she failed or that she will necessarily need insulin permanently.
Insulin resistance usually decreases dramatically immediately after the placenta is delivered. For many women with gestational diabetes, glucose becomes much lower within the first day or several days after birth.
The maternity team commonly stops pregnancy insulin after delivery and checks glucose to see whether further treatment is needed. She should not stop insulin before delivery or make her own postpartum plan. The hospital team should give her clear instructions based on her readings.
Yes. Gestational diabetes often resolves, but it should never be assumed to have disappeared permanently. Some cases represent previously unrecognized prediabetes or type 2 diabetes, and a small number may reflect another form of diabetes.
Persistently high glucose after delivery needs medical evaluation. Symptoms such as marked thirst, frequent urination, blurred vision, unexplained weight loss, or repeated high readings should be reported promptly.
She should have a fasting 75-gram oral glucose tolerance test 4–12 weeks after delivery. This measures fasting glucose and glucose two hours after the standardized drink using nonpregnancy diagnostic ranges.
The oral glucose tolerance test is preferred over HbA1c during this early postpartum period because pregnancy-related red-blood-cell changes and blood loss at delivery can make HbA1c less reliable. Even when the postpartum test is normal, she should be screened for prediabetes or type 2 diabetes every one to three years.
Some babies exposed to high maternal glucose produce extra insulin. After the umbilical glucose supply stops at birth, that insulin can lower the baby's glucose. This is called neonatal hypoglycemia.
It is a possible complication, not something every baby experiences. The newborn team may arrange early feeding and glucose checks and will also watch for jaundice,
Gestational diabetes does not directly cause type 1 diabetes. Type 1 diabetes is an autoimmune condition, and the mother's gestational diabetes does not mean the baby will be born with it.
Family genetics may affect a child's background risk, but gestational diabetes itself is more clearly associated with a higher future risk of excess weight, insulin resistance, and type 2 diabetes. This risk is not a certainty and should not be used to blame the mother or child.
Breastfeeding is encouraged and may reduce the mother's future risk of type 2 diabetes. If insulin is temporarily continued after birth, doses must be reviewed because insulin needs fall rapidly and breastfeeding may increase the risk of overnight hypoglycemia.
At 34 weeks, she should continue insulin, food planning, glucose monitoring, and fetal follow-up exactly as prescribed. The team should discuss fetal growth, delivery timing, glucose management during labor, and newborn monitoring.
She can use a blood sugar log and review our guide to gestational diabetes treatment.
Before delivery, contact the maternity unit immediately for reduced fetal movement, vaginal bleeding, leaking fluid, regular painful contractions, severe headache, vision changes, pain under the right ribs, or very high glucose with vomiting or ketones. After delivery, seek urgent care for severe weakness, confusion, repeated high glucose, vomiting, difficult breathing, or symptoms of a blood clot, infection, or postpartum preeclampsia.
Most women no longer require pregnancy insulin after delivery, but only postpartum glucose monitoring can confirm this. The essential follow-up is a 75-gram oral glucose tolerance test at 4–12 weeks and lifelong screening. The baby may need temporary glucose monitoring after birth but will not automatically develop type 1 or type 2 diabetes.
Educational safety note: This answer is for general diabetes and pregnancy education only. It does not replace personal obstetric, diabetes, or pediatric care. She should not start, stop, or change insulin, food intake, supplements, or activity without instructions from her maternity team.
Last reviewed: July 2026.
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