Type 1 Diabetes During Pregnancy: Monitoring and Care

By trimester

Weeks 1–13

1st trimester

Early in pregnancy, review insulin, low-glucose recognition, and baseline eye and kidney assessments.

Weeks 14–27

2nd trimester

As insulin resistance changes, review glucose patterns and nutrition with the specialist team.

Weeks 28–birth

3rd trimester

Before birth, document labor management, the postpartum insulin plan, and feeding support.

What does the evidence show for type 1 diabetes?

• Type 1 diabetes involves too little or no insulin production. Insulin remains essential during pregnancy; nutrition changes or supplements cannot replace it. The care team helps adjust delivery by injections or a pump as needs change. 1
• ADA 2026 guidance recognizes a higher risk of low glucose early in pregnancy and after delivery. It also notes that ketoacidosis can occur at lower glucose levels during pregnancy. Ask for personalized instructions covering lows, illness, ketone testing, and urgent contact. 2
• Pregnancy can affect existing eye, kidney, and nerve problems. Early assessment creates a baseline for follow-up and allows the team to review blood pressure, medicines, and nutrition alongside daily glucose management. 3
• Fetal monitoring and birth planning depend on glucose management, growth, and other findings. Diabetes does not establish one delivery date or require cesarean birth in every case. Ask why each proposed test or timing decision applies to you. 4
• Chest pain, difficulty breathing, fainting, severe headache, new vision changes, or reduced fetal movement needs prompt medical assessment. Do not assume every concerning symptom is explained by a glucose reading. 5

Questions to discuss with your care team

When should I call my provider about type 1 diabetes?

Follow your diabetes emergency plan for severe low glucose, vomiting with ketones, or inability to keep fluids down. Obtain urgent assessment for severe headache, vision change, trouble breathing, or reduced fetal movement. Call emergency services for unconsciousness, a seizure, or severe breathing difficulty. Trust your read on your own body. If something feels off beyond the list above, please consult your healthcare provider rather than waiting it out.