What should you know about gestational diabetes and constipation?

Constipation during pregnancy may relate to hormonal changes, pressure from the growing uterus, lower activity, changes in eating patterns or iron supplements. Gestational diabetes affects how the body handles glucose and may be present without obvious symptoms, which is why scheduled testing and antenatal reviews matter. One condition does not confirm the other.

A diabetes-friendly eating plan still needs enough fibre and fluid for bowel health. Large dietary changes, skipped meals or restricting food to avoid glucose readings can leave you unwell and may not support pregnancy. Your maternity team can adapt the plan to your readings, appetite and stage of pregnancy.

Follow the meal and glucose-monitoring plan you were given, drink fluids regularly unless a clinician has limited them, and add fibre gradually through foods that fit your plan. Gentle movement, if approved for your pregnancy, can support bowel function. Take time on the toilet without straining and respond when you feel the urge.

If constipation began after an iron supplement or another medicine, ask the maternity team whether the product or timing can be changed. Do not start a laxative, herbal product or high-fibre supplement without checking that it is suitable in pregnancy and compatible with your glucose plan.

Seek prompt advice for severe or persistent abdominal pain, repeated vomiting, a swollen abdomen, blood in the stool, inability to pass stool or gas, or constipation that is not improving. Contact your diabetes or maternity team if readings are repeatedly outside your agreed range, you cannot keep food or fluids down, or you are unsure how to adjust meals while treating constipation.

Ask which fibre-rich foods fit your glucose plan, how much fluid and activity are suitable, whether iron could be contributing, and which pregnancy-safe bowel treatment to use if food and movement are not enough. Ask when your glucose readings or bowel symptoms should be reviewed.