Constipation at 18 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 18
Your baby is now the size of a bell pepper.
- If female, the uterus and fallopian tubes are formed.
- If male, genitals may be visible on ultrasound.
- Myelin (nerve coating) begins forming.
🔬 Why You're Experiencing Constipation at Week 18
- 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 18
📋 Other Week 18 Symptoms
⚠️ 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.