38 Weeks Pregnant: Real Labor vs. False Labor — How to Tell the Difference
Medically reviewed by Dr. Sarah Chen, MD, FAAP · Updated May 2026 See also: Water breaking: what it feels like and what to do.
Your baby at 38 weeks
Large leek — 19.6 inches (49.8 cm), 6.8 lbs
How Do You Know When Labour Is Actually Starting at 38 Weeks?
Real labour follows the 5-1-1 rule: contractions every 5 minutes, lasting 1 minute each, for at least 1 hour — and they intensify when you walk. Braxton Hicks ease with movement or water. Go to hospital immediately if your water breaks, regardless of contractions.
Quick answer
Real labor has a pattern. False labor doesn't. Real contractions get closer together, last longer, and intensify when you walk. Braxton Hicks ease when you move, drink water, or change position.
The mechanism: Real labor contractions are driven by oxytocin and prostaglandins causing coordinated uterine muscle contractions from the top down, creating a consistent cervix-dilating force. Braxton Hicks are uncoordinated and don't dilate the cervix.
The 5-1-1 rule: Start timing when contractions are 5 minutes apart, lasting 1 minute each, for at least 1 hour. That's when most providers say go — not the first contraction.
Go immediately if: water breaks (any amount — clear, cloudy, or green-tinged), you have heavy bleeding, baby's movement drops significantly, or you feel the urge to push.
How to tell the difference in practice
- Time 3–4 contractions in a row. If the interval is consistent (e.g., every 8–9 minutes) and not changing, note the time and keep timing. If the interval is all over the place (7 min, 12 min, 4 min, 11 min), that's almost certainly false labor. This is why timing apps are more useful than intuition at this stage — patterns are hard to track in your head when each contraction feels urgent.
- Take a walk. Real labor contractions get stronger when you walk. Braxton Hicks often disappear. This is the most reliable self-test you have. This usually settles the question within 10–15 minutes — if they're getting stronger on the walk, it's time to start the 5-1-1 clock.
- The mucus plug and bloody show: These are signs of cervical change, not active labor. Bloody show (mucus tinged with blood) typically precedes labor by hours to days — call your provider but don't rush to hospital on its own. This changes in interpretation once you have regular contractions alongside it — bloody show plus regular timing means go.
- Water breaking: Only about 10–15% of labors begin with water breaking. When it does, go to the hospital regardless of whether contractions have started — there's a small risk of cord prolapse that warrants immediate evaluation. This is why 'wait and see' is not the right approach when membranes rupture — even without contractions, go in.
- At 38 weeks your baby's lungs are functionally mature. Every day from here the brain continues developing — but if labor starts, your baby is ready to breathe independently. This is why 38-week outcomes are excellent — the lungs are functionally complete even though brain development continues for years after birth.
If labour hasn't started by 39–40 weeks, your provider will start discussing induction options — here's what that conversation typically looks like and what questions to ask.
38 weeks: how to tell if labor is starting — for real this time
Baby: Size of a leek (~19.6 inches, ~6.8 lbs) · Fully developed, lanugo shedding, brain and lungs final refinement · Body: Pelvic pressure intense, possible mucus plug loss, frequent Braxton Hicks · Key fact: 38 weeks is early term — most healthy babies born 38–42 weeks · Watch for: Regular contractions, water breaking, reduced fetal movement
Here's the exact difference between real labor and false labor, which signs mean go now, and what's still developing in these final days.
At 38 weeks, the waiting is its own kind of exhaustion. Every ache gets analyzed. Every tightening gets timed. That hyperawareness is completely normal — your brain is preparing you for the sprint ahead. The most useful thing you can do right now is internalize the 5-1-1 rule: contractions every 5 minutes, lasting 1 minute, for at least 1 hour — that's when you go. Everything before that threshold: breathe, time it, and stay home.
Rest as much as possible — labor and delivery are physically demanding. Accept all help offered.
Understanding what your body is already doing to prepare — even if you can't feel it — makes the waiting easier.
🌱 Baby's development this week
- Lanugo mostly gone
- Vocal cords fully formed for that first cry
- Organs ready for independent life
- Brain and nervous system continue developing (will continue for years)
Babies born at 38 weeks have the same survival rates as those born at 40 weeks, but subtle differences in lung maturity and neurodevelopment persist. Each day in the womb from here is biologically meaningful.
🤰 Your symptoms this week
💛 Changes in your body
- Cervix continuing to ripen and dilate
- Pelvic floor pressure may make walking uncomfortable
- Strong nesting urge
- Colostrum may be leaking regularly
Labor anxiety reaches its peak this week. Reading birth stories (positive ones), practicing breathing, and having a clear birth plan reduces anxiety significantly.
What Labor Feels Like at 38 Weeks: Signs to Know
At 38 weeks, labor can begin any day. Knowing the difference between practice contractions and real labor eliminates the most common reason people call their maternity unit unnecessarily — and ensures you don't wait too long.
Braxton Hicks vs. real labor contractions:
- Braxton Hicks: Irregular, don't increase in frequency, ease with movement or a warm bath, not usually painful
- Real labor: Regular intervals that shorten over time, increase in duration (30 → 60 → 90 seconds), increase in intensity, don't ease with movement, come from the back and wrap around
The 5-1-1 rule for when to go to hospital: Contractions every 5 minutes, lasting 1 minute, for 1 hour. This is the general threshold — your provider may give different guidance based on your history or distance from hospital.
Go immediately regardless of contractions:
- Water breaks — call your provider before going, confirm they want you to come in
- Heavy vaginal bleeding
- Severe headache with vision changes
- Decreased fetal movement
Read the postpartum guide and recovery week by week now — much easier to read before labor than after.
🥗 Nutrition focus
- Energy-dense foods — this is not the time to restrict calories; you need reserves for labor
- Continue iron — blood loss at delivery averages 500ml, and your iron reserves matter for recovery
- Ginger tea soothes nausea that often accompanies late-term pregnancy
38-week appointment: cervical check, baby position, blood pressure, discuss what to do when labor begins.
What should you do right now?
- NORMALIf Contractions are irregular and ease when you walk or drink water — This is Braxton Hicks — rest, hydrate, and keep timing if you're unsure. No need to go in yet.
- ACT NOWIf Contractions are every 5 minutes, lasting 1 minute each, for over 1 hour — Apply the 5-1-1 rule — go to hospital now. Call ahead so the team is ready.
- ACT NOWIf Your water breaks — any amount, any color — Go to hospital immediately, even if contractions haven't started. Do not drive yourself if the flow is heavy.
- MONITORIf You see bloody show — mucus tinged with blood — Note the time — this usually means labor within hours to days. Call your provider and start timing contractions if they begin.
- ACT NOWIf Baby's movement feels much less than your usual pattern today — Call your provider now — do not do a kick count first and wait. At 38 weeks, reduced movement always warrants immediate contact.
- ACT NOWIf You feel the urge to push or rectal pressure during a contraction — Go to hospital now — this indicates active labor and you may be further along than expected.
ACT NOW = call provider or go to hospital · MONITOR = watch and note · NORMAL = expected, no action needed
✅ This week's checklist
Start reading about postpartum recovery now
At 38 weeks, you're nearly there. Knowing what to expect after birth — physically, mentally, and practically — makes the fourth trimester far less overwhelming. These are the most-read postpartum guides.
Frequently Asked Questions: 38 Weeks Pregnant
How big is baby at 38 weeks?+
At 38 weeks, your baby is approximately 19.6 inches (49.8 cm) long and weighs about 6.8 lbs (3.1 kg) — roughly the size of a leek. Baby is fully developed; the remaining time is primarily for final lung and brain refinement and laying down fat.
Is 38 weeks full term?+
38 weeks is classified as early term (37–38 weeks) rather than full term (39–40 weeks). Outcomes are excellent at 38 weeks, but there is a slightly higher rate of respiratory issues and jaundice compared to 39+ weeks. There is no medical reason to electively deliver before 39 weeks in an uncomplicated pregnancy.
What are signs of labor at 38 weeks?+
Signs labor may be starting: regular contractions following the 5-1-1 pattern (every 5 minutes, 1 minute long, for 1 hour), mucus plug loss (bloody show), water breaking (call your provider immediately), lower back pain that radiates around the abdomen, or an increase in pelvic pressure.
What are common symptoms at 38 weeks pregnant?+
Common symptoms at 38 weeks: intense pelvic pressure, Braxton Hicks contractions becoming more frequent, lower back pain, disrupted sleep, heartburn, swelling, and nesting instinct. Breathing may become easier if the baby has dropped into the pelvis.
What if I go past my due date from 38 weeks?+
Your due date is at 40 weeks — at 38 weeks you still have approximately 2 weeks to your due date. Going past your due date (41–42 weeks) is common and not immediately concerning, though induction is typically offered at 41–42 weeks. Read the week 40 guide for post-dates management.
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