Weeks 12-40

Heartburn & Acid Reflux

Last reviewed by medical team: June 2026

🔵 Common Pregnancy Symptom

Why It Happens

Progesterone relaxes the valve at the top of your stomach, allowing stomach acid to splash back into the esophagus. Later on, physical pressure from the growing uterus pushes acid upward.

Safe Home Remedies

Eat small, frequent meals rather than large ones.
Avoid spicy, greasy, acidic, or fried foods.
Remain upright for at least 1-2 hours after eating.
Elevate the head of your bed by 6 inches.

⚠️ When to Contact a Doctor

Contact your doctor if heartburn is severe, interferes with sleeping or eating, or is accompanied by pain in the upper right abdomen.

Related Guides & Resources

Typical Week Ranges

This symptom commonly occurs during these weeks of pregnancy:

Week 12 Week 17 Week 22 Week 27 Week 32 Week 37

Related Conditions

Symptom matches for these prenatal conditions:

✦ Gestational Diabetes ✦ Preeclampsia

Clinical Questions & Answers

Q1: Are antacids safe during pregnancy?

Calcium carbonate antacids (like Tums) are generally safe, but avoid high-sodium or aluminum antacids.

Q2: Why does heartburn get worse at night?

Lying flat allows stomach acid to flow easily up the esophagus. Prop yourself up with pillows.

Q3: Does heartburn mean my baby will have lots of hair?

While a popular old wives' tale, some studies suggest a link due to the same hormones that cause heartburn also promoting hair growth.