3rd Trimester

Week 38 of Pregnancy

Your baby weighs about 3.1 kg — gaining 200g per week. Lungs are mature. Brain and liver are still developing. Labor could start any day.

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Your Baby This Week

About the size of a watermelon

Length: ~49cm, 3.1 kg

Quick Answer

At 38 weeks, your baby weighs about 3.1 kg (~49cm) and is gaining about 200g per week. Lungs are mature now — baby can breathe on their own. Brain and liver are still developing and will continue to develop after birth. You’re in the final stretch. Labor could start today, next week, or at 42 weeks — there’s no way to predict it exactly. Stay alert, stay rested, stay close to your hospital.

Baby Development at Week 38

Your baby is almost fully cooked:

  • Lungs are mature — surfactant production is complete. Baby can breathe independently
  • Brain is still developing — and will continue developing for years after birth. These last weeks build critical neural connections
  • Liver is still developing — it will fully mature in the first year of life
  • Gaining about 200g per week — mostly fat deposits
  • Meconium is building up — baby’s first stool. Dark, tar-like substance in the intestines
  • Firm grasp — baby’s grip is strong enough to hold your finger at birth
  • Skin is smooth — most of the vernix has been absorbed. Lanugo is mostly gone

Baby’s brain at birth will weigh about 350-400g — it will nearly triple by age 2-3. This is why the last few weeks in the womb matter.

Your Body at Week 38

Every twinge feels like “is this it?” That’s normal. Your body is in the final countdown.

Common Symptoms

SymptomWhat’s HappeningWhat Helps
Cervical changesCervix softening, thinning (effacing), and possibly dilatingYou may not feel this. Doctor checks at weekly visits
Mucus plug / bloody showThick discharge, possibly blood-tinged. Cervix is changingNormal. Not urgent unless heavy red bleeding
Intense Braxton HicksCan be confused with real labor. More frequent and strongerTime them. If irregular and stop with rest = Braxton Hicks
Pelvic pressure — extremeBaby is very low nowWarm bath. Rest. Almost done
InsomniaPhysical discomfort + mental anticipationDon’t fight it. Rest even without sleeping. Nap when you can
Emotional swingsExcitement, fear, impatience, anxiety — all at onceCompletely normal. Talk about it
Diarrhea / loose stoolsBody preparing. Prostaglandins that ripen cervix also affect bowelsStay hydrated. Could mean labor is close
Lower back painBaby’s head pressing on sacrum + weightHot compress. Gentle rocking on birthing ball

Early Labor Signs to Watch For

You might be in early labor if:

  • Contractions start coming at regular intervals
  • They don’t go away with rest, walking, or changing position
  • They gradually get stronger, longer, and closer together
  • You have a “bloody show” — mucus tinged with pink or brown blood
  • Lower back pain that comes in waves
  • You feel the urge to use the bathroom frequently

Early labor can last hours to days, especially for first-time mothers. You don’t need to rush to the hospital yet — wait for the 5-1-1 pattern.

Birth Preparation

What to Expect During Labor

Stage 1 — Cervix dilates from 0 to 10 cm:

  • Early labor (0-4 cm): Contractions every 5-20 minutes. Can last hours. Stay home, rest, eat light, time contractions
  • Active labor (4-7 cm): Contractions every 3-5 minutes, lasting 1 minute. Head to hospital. Can’t talk through them
  • Transition (7-10 cm): Most intense phase. Contractions every 2-3 minutes. Nausea, shaking, pressure. Shortest phase

Stage 2 — Pushing (10 cm to delivery):

  • Can last 30 minutes to 3 hours (first baby). You push with each contraction
  • Doctor will guide you on when and how to push

Stage 3 — Placenta delivery:

  • 5-30 minutes after baby. Usually painless comparatively

Pain Management Options

  • Epidural — most effective. Numbs from waist down. Available at most hospitals
  • Breathing techniques — lamaze, hypnobirthing. Practice now
  • Movement and positions — walking, squatting, birthing ball, warm water
  • TENS machine — electrical stimulation on lower back
  • Gas and air — Entonox. Available at some hospitals in India

What to Do When Water Breaks

  1. Note the time — your doctor will ask
  2. Note the color — clear or light yellow = normal. Green or brown = meconium, go immediately
  3. Note the amount — gush (big) or trickle (small, continuous)
  4. Put on a pad — to monitor color and amount
  5. Call your doctor — they’ll tell you when to come in
  6. Don’t put anything in the vagina — no tampons, no checking yourself
  7. Head to hospital — most doctors want you there within a few hours of water breaking

Tests & Screenings Due

Weekly Visit

  • Blood pressure
  • Urine test
  • Baby’s heartbeat
  • Baby’s position
  • Cervical check — dilation and effacement
  • Estimated baby size

NST If Indicated

Non-stress test for high-risk pregnancies (gestational diabetes, hypertension, reduced movements, post-dates).

Nutrition This Week

  • Continue 6 dates per day
  • Light, easily digestible meals — you don’t want a heavy stomach when labor starts
  • Stay well-hydrated
  • Keep quick-energy snacks accessible — honey, glucose biscuits, energy bars, juice
  • During early labor, eat light if allowed — toast, fruit, soup
  • Continue iron and calcium supplements

When to Call Your Doctor

Use the 5-1-1 Rule

Contractions every 5 minutes, lasting 1 minute, for 1 hour. Head to hospital.

Go IMMEDIATELY If:

  • Water breaks — especially if fluid is green/brown
  • Heavy vaginal bleeding — soaking a pad
  • Severe headache + visual changes — blurred vision, seeing spots
  • Baby not moving — no movement despite eating and resting
  • Cord visible or felt — emergency. All fours, chest down, hips up. Call ambulance
  • Severe abdominal pain — constant, not in waves (could be placental abruption)

What’s Coming Up

  • Week 39: Full term. All systems ready. Ideal delivery window begins
  • Week 40: Due date — but only 5% of babies arrive exactly on their due date
  • Week 41: If no labor, doctor will discuss induction options

Aapke Sawaal (Common Questions)

Pani break hone ke baad kitni der mein hospital jana chahiye?

Jaise hi pani break ho, doctor ko call karein. Usually 2-4 ghante mein hospital aana chahiye — infection risk badhta hai time ke saath. Agar pani green ya brown hai toh TURANT jayein — iska matlab baby ne meconium pass kiya hai. Pani break hone ke baad nahaayein nahi aur vagina mein kuch na daalein.

Epidural safe hai kya? Baby ko effect karta hai?

Epidural bahut safe hai — duniya bhar mein millions of deliveries mein use hota hai. Baby ko minimal effect hota hai. Ye aapko waist se neeche numb karta hai lekin aap conscious rehti hain aur push kar sakti hain. Side effects: temporary BP drop, headache (rare), back soreness. Discuss karein apne doctor se ki aapke hospital mein available hai ya nahi.

Delivery ke turant baad baby ko kya vaccines lagte hain?

Birth ke 24 ghante ke andar teen vaccines lagte hain:

  1. BCG — TB se protection
  2. Hepatitis B (pehli dose) — liver infection se protection
  3. OPV-0 — Polio ki zero dose

Ye hospital mein discharge se pehle lag jaati hain. Universal Immunization Programme ke under free hain. In vaccines ko skip mat karein.

Week 38 Checklist

  • Attend weekly prenatal visit
  • Continue kick counts — report any changes
  • Keep hospital bag ready and transport arranged
  • Review the 5-1-1 rule with your partner
  • Rest as much as possible — you'll need energy for labor
  • Finish any last-minute baby preparation
  • Review birth vaccines — BCG, Hep B, OPV-0 within 24 hours of birth
  • Know the signs: go immediately if water breaks, heavy bleeding, severe headache with visual changes, baby not moving, cord visible

Have Questions About Week 38?

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Medically Reviewed

by Babynama Pediatricians · Updated 2026-03-12