Pregnancy Constipation: Causes and Safe Remedies

Why pregnancy causes constipation

Progesterone relaxes digestive tract muscles, slowing movement and making stools harder. Iron supplements, reduced activity, the growing uterus pressing on the bowel, and not drinking enough water all contribute.

What you can do

Increase fibre gradually. Aim for 25 to 30g per day: wholemeal bread, oats, fruits (especially prunes, kiwi, pears), vegetables, beans, and lentils. Drink plenty of water. At least 6 to 8 glasses daily. Warm water first thing can help. Stay active. A 20 to 30 minute walk each day stimulates digestion. Try prune juice. Prunes contain sorbitol, a natural laxative. Do not ignore the urge. Delaying makes stools harder. Review your iron supplement. Ask about switching to ferrous fumarate or liquid iron, or taking every other day.

Safe laxatives in pregnancy

Lactulose. Osmotic laxative, first choice in pregnancy. Takes 2 to 3 days to work. Macrogol (Laxido/CosmoCol). Safe osmotic laxative. Ispaghula husk (Fybogel). Bulk-forming laxative, take with plenty of water. Stimulant laxatives (senna, bisacodyl) are not first choice but your GP may suggest a short course. Always check with your midwife or pharmacist.

When to see your GP

If constipation is severe after 2 weeks of dietary changes, if you are passing blood, if you have significant abdominal pain, or if you develop haemorrhoids.

After the birth

Constipation can continue postpartum, especially after caesarean or with codeine-based pain relief. Continue with fibre, fluids, and gentle activity.