Will my baby be OK? Gestational diabetes risks, explained
With good blood sugar control, most pregnancies with gestational diabetes have good outcomes. The risks come from blood sugar that stays high: a large baby, a harder birth, and low blood sugar in the baby after birth. Treatment lowers these risks; in a US trial it cut the share of large babies by about half.
Why high blood sugar matters
When blood sugar is high, more sugar passes to the baby than it needs, and the baby can gain a lot of weight.1 MedlinePlus says that with good control, most pregnancies have good outcomes.2
| For the baby | For you |
|---|---|
| Growing large (9 pounds, about 4 kg, or more), which raises the chance of a shoulder injury in a vaginal birth1 | A harder labor, heavy bleeding after birth, and severe tears1 |
| Low blood sugar, breathing problems and jaundice after birth1 | A higher chance of a cesarean birth2 |
| A higher risk of stillbirth1 | High blood pressure and preeclampsia are more common1 |
| Later in life: a higher risk of obesity, high blood pressure and type 2 diabetes3 | Later in life: a higher risk of type 2 diabetes1 |
The extra checks late in pregnancy exist because of these risks; see the third trimester and preeclampsia warning signs.
What treatment changes
In a US trial, 958 women with mild gestational diabetes got either usual care or treatment (food changes, blood sugar checks, and insulin if needed).4
| Outcome | Usual care | Treatment |
|---|---|---|
| Baby large for its age | 14.5% | 7.1% |
| Birth weight over 4,000 g (about 8 lb 13 oz) | 14.3% | 5.9% |
| Shoulder stuck during birth (shoulder dystocia) | 4.0% | 1.5% |
| Cesarean birth | 33.8% | 26.9% |
| Preeclampsia or high blood pressure of pregnancy | 13.6% | 8.6% |
The trial's main combined measure (stillbirth, newborn death and several newborn problems together) was not clearly different between the groups: 37.0% and 32.4%.4
What you can do
- Go to the extra prenatal visits, check your blood sugar, and follow your plan. ACOG says this lowers the risks for you and your baby.1
- Record every reading, including the high ones; your team adjusts your plan from the pattern. In First Fork, each reading is checked against the targets your clinic gave you.
- Tell your baby's doctor you had gestational diabetes. ACOG advises checking the child's blood sugar as they grow.1
Questions
Will my baby be OK if I have gestational diabetes?
With good blood sugar control, most pregnancies with gestational diabetes have good outcomes. Treatment lowers the main risks.
Will my baby be born with diabetes?
No. But high blood sugar before birth raises the child's later risk of obesity, high blood pressure and type 2 diabetes, so tell your baby's doctor.
Does treatment really help?
Yes. In a US trial, treatment cut large babies from 14.5% to 7.1% and shoulder dystocia from 4.0% to 1.5%.
Did I cause my gestational diabetes?
No. Pregnancy hormones make insulin work less well, and ACOG says it can develop in people with no risk factors.
Sources
- ACOG. Gestational Diabetes (FAQ 177, reviewed April 2026). https://www.acog.org/womens-health/faqs/gestational-diabetes
- MedlinePlus (US National Library of Medicine). Gestational diabetes. https://medlineplus.gov/ency/article/000896.htm
- American Diabetes Association. 15. Management of Diabetes in Pregnancy: Standards of Care in Diabetes—2026. Diabetes Care 2026;49(Suppl. 1):S321. https://pmc.ncbi.nlm.nih.gov/articles/PMC12690181/
- Landon MB, et al. A multicenter, randomized trial of treatment for mild gestational diabetes. N Engl J Med 2009;361:1339–1348. https://pmc.ncbi.nlm.nih.gov/articles/PMC2804874/
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