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Week 37 · Third Trimestermild

Constipation at 37 Weeks Pregnant

Constipation is extremely common during pregnancy, affecting up to 40% of women. Pregnancy hormones slow intestinal movement, and the growing uterus puts pressure on the bowel.

👶 What's Happening at Week 37

Your baby is now the size of a winter melon.

  • The baby is now 'early term' — nearly ready for birth.
  • Brain and lung maturation continues.
  • The baby practices breathing, sucking, and gripping.

🔬 Why You're Experiencing Constipation at Week 37

  • Progesterone relaxes smooth muscle, slowing the digestive tract
  • Growing uterus compresses the bowel
  • Prenatal iron supplements (a common culprit)
  • Reduced physical activity
  • Not drinking enough fluids

💊 Relief Tips for Week 37

1
Increase Fiber IntakeAim for 25–30 g of fiber daily from fruits, vegetables, whole grains, beans, and prunes.
2
Drink More WaterAt least 8–10 glasses of water per day keeps stool soft and moving.
3
Prunes and Prune JuicePrunes contain sorbitol, a natural laxative. A small glass of prune juice daily is safe and effective.
4
Regular Light ExerciseWalking 20–30 minutes daily stimulates bowel motility.
5
Switch Prenatal VitaminsIf iron supplements are the culprit, ask your provider about a lower-iron prenatal or a slow-release iron formula.

📋 Other Week 37 Symptoms

Lightning crotch (sharp pelvic pain)Nesting urge (intense)Mucus plug dischargeDiarrheaDifficulty sleeping
See full Week 37 guide →

⚠️ Call Your Doctor If…

  • You haven't had a bowel movement in more than 3 days despite trying remedies
  • You have severe abdominal pain or cramping with constipation
  • You notice rectal bleeding
  • Constipation is accompanied by fever or vomiting

Frequently Asked Questions

Is it safe to take laxatives during pregnancy?

Bulk-forming laxatives (psyllium, methylcellulose) and stool softeners (docusate sodium) are generally considered safe. Stimulant laxatives like senna should only be used briefly and under provider guidance.

Can constipation hurt my baby?

Constipation itself is uncomfortable but doesn't harm the baby. However, severe straining should be avoided as it can worsen hemorrhoids.

When does pregnancy constipation start?

It often starts in the first trimester when progesterone rises rapidly, and can continue throughout pregnancy.

Can constipation cause contractions?

In rare cases, severe constipation or straining can trigger Braxton Hicks contractions, but it does not cause preterm labor.

Medical Disclaimer: This content is for informational purposes only and does not constitute medical advice. Always consult your OB/GYN or midwife about symptoms during pregnancy.