Braxton Hicks Contractions at 21 Weeks Pregnant
Braxton Hicks contractions are irregular practice contractions that can start as early as the second trimester. They help your uterus prepare for labor but are not a sign that labor is starting.
👶 What's Happening at Week 21
Your baby is now the size of a carrot.
- The fetus is swallowing amniotic fluid and absorbing nutrients.
- Bone marrow is now producing blood cells.
- Small intestine begins absorbing sugars.
🔬 Why You're Experiencing Braxton Hicks Contractions at Week 21
- Normal uterine muscle activity as the uterus practices for labor
- Dehydration — one of the most common triggers
- Full bladder putting pressure on the uterus
- Increased activity or exercise
💊 Relief Tips for Week 21
📋 Other Week 21 Symptoms
⚠️ Call Your Doctor If…
- Contractions become regular (every 5-10 minutes) and don't stop with rest/hydration
- More than 6 contractions per hour before 37 weeks (possible preterm labor)
- Contractions accompanied by vaginal bleeding, fluid leakage, or lower back pain
- Contractions get progressively stronger and closer together
Frequently Asked Questions
How do I tell Braxton Hicks from real labor?
Braxton Hicks are irregular, don't get closer together, usually stop with rest/water, and are felt in the front. Real contractions are regular, get progressively stronger and closer, and often start in the back.
Can Braxton Hicks start in the second trimester?
Yes! Many women feel them starting around 20 weeks, though they're usually mild and infrequent. First-time moms may not notice them until the third trimester.
Are Braxton Hicks painful?
They're usually uncomfortable but not painful — more of a tightening sensation. If they become painful, regular, or you can't talk through them, they may be real contractions.