2nd Trimester

Week 27 of Pregnancy

Your baby weighs about 900g (~37cm) — eyes open and blink for the first time! Eyelashes are present and REM sleep begins. Last week of the second trimester.

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Your Baby This Week

About the size of a coconut

Length: ~37cm, ~900g

Quick Answer

At 27 weeks, your baby weighs about 900g and is approximately 37cm long — the size of a coconut. The milestone this week: baby’s eyes open and blink for the first time. Eyelashes are present, and REM sleep has begun — your baby may be dreaming. This is the last week of the second trimester. Next week, you enter the third trimester and things shift gear. Ek aur hafta — phir final stretch shuru.

Baby Development at Week 27

A beautiful week for baby’s development:

  • Eyes open and blink — for the first time, your baby can open their eyes. They can see light filtering through the uterine wall
  • Eyelashes are present — delicate lashes have formed
  • REM sleep begins — brain activity during sleep shows patterns similar to dreaming. Baby has distinct sleep-wake cycles
  • Brain is growing rapidly — the surface of the brain is starting to develop the characteristic folds (grooves and ridges) that increase surface area
  • Lungs continuing to mature — surfactant production increasing each day
  • Hearing is well-developed — baby recognizes your voice and your partner’s voice
  • Hiccups — you might feel rhythmic, repetitive movements. That’s baby hiccupping — it’s practice for breathing

At this point, survival rates if born prematurely are approximately 80%+ with good NICU care.

Your Body at Week 27

Last week of the second trimester. You’re likely feeling heavier and more tired.

Common Symptoms

SymptomWhat’s HappeningWhat Helps
Leg crampsEspecially at night. May be related to calcium, magnesium, or circulationStretch calves before bed, stay hydrated, flex feet (not point toes)
HeartburnPersistent. Uterus pushing everything upwardSmall meals, sleep propped up, ask doctor about safe antacid
SwellingFeet, ankles, hands. Worse by eveningElevate feet, reduce salt, stay hydrated (counterintuitive but true)
Restless legsUncomfortable urge to move legs, especially at restWalking before bed, iron levels check, warm compress
Braxton HicksMore frequent as third trimester approachesDrink water, change position. Call doctor if regular/painful
BreathlessnessDiaphragm compressed by growing uterusNormal. Take stairs slowly. Sleep with extra pillow

Getting Ready for the Third Trimester

Next week marks a major transition:

  • Prenatal visits increase to every 2 weeks (instead of monthly)
  • Kick counting becomes a daily routine
  • Things move faster from here — start preparing for delivery

Tests & Screenings Due

Final Call for GDM Screening

If you haven’t done it yet, this is your last week within the recommended window (24-28 weeks). Don’t skip it.

Prepare for 28-Week Appointments

  • Anti-D injection for Rh-negative mothers — due next week
  • Third trimester blood work — hemoglobin recheck (anemia can worsen), repeat blood sugar if borderline
  • Your doctor may start growth scans (ultrasound to check baby’s size and amniotic fluid)

Routine

  • Blood pressure
  • Urine for protein and sugar
  • Fundal height
  • Fetal heart rate

Nutrition This Week

Baby’s brain is growing fast — it needs fuel.

What to Prioritize

  • DHA/Omega-3 — baby’s brain is developing those crucial folds. Fish (rohu, pomfret), walnuts, flaxseeds, fortified eggs
  • Protein: 78g/day — baby is building muscle and organs. Dal, paneer, eggs, chicken, chana, rajma
  • Calcium: 1000 mg/day — bones are hardening. Doodh, dahi, ragi, til, paneer
  • Iron — third trimester anemia is common. Continue supplements + iron-rich foods (palak, beetroot, jaggery, pomegranate)
  • Vitamin C — helps iron absorption. Amla, nimbu, orange, guava
  • Small, frequent meals — 5-6 per day instead of 3 large ones. Better for heartburn and blood sugar

What to Avoid

  • Heavy, oily meals — worsen heartburn
  • Excess sweets — blood sugar control matters
  • Very salty foods — worsens swelling
  • Caffeine — under 200 mg/day
  • Skipping meals — can cause dizziness and blood sugar drops

When to Call Your Doctor

Red flags at this stage:

  • Vaginal bleeding — any amount
  • Fluid gushing or steady leaking from vagina — PPROM
  • Regular contractions before 37 weeks — especially if they don’t stop with rest
  • Severe headache, vision changes, sudden swelling of face/hands — preeclampsia
  • Reduced fetal movements — if your active baby suddenly goes quiet
  • Severe itching — especially palms and soles (obstetric cholestasis)
  • Fever above 100.4°F (38°C) with chills
  • Severe abdominal pain

What’s Coming Up

  • Week 28: Third trimester begins! Prenatal visits every 2 weeks. Kick counting starts (10 movements in 2 hours). Anti-D injection for Rh-negative mothers
  • Week 29: Baby’s bones start storing calcium, iron, and phosphorus
  • Week 30: Body fat accumulating rapidly, including brown fat for temperature regulation. Brain maturing rapidly

Aapke Sawaal (Common Questions)

Baby ki hiccups feel ho rahi hain — kya yeh normal hai?

Bilkul normal! Baby hiccups hona breathing practice ka hissa hai. Yeh rhythmic, repetitive movements feel hote hain — kicks se different. Din mein kai baar ho sakte hain. Yeh actually ek good sign hai ki baby ka nervous system develop ho raha hai. Agar bahut lambe time tak hon ya bahut frequent hon toh doctor ko batayein.

Third trimester mein kya changes aayenge?

Week 28 se doctor visits har 2 hafte mein honge (monthly ki jagah). Aapko daily kick counting karni hogi — 2 ghante mein 10 movements. Weight zyada badhega, thakan zyada hogi, aur baby neeche aana shuru hoga. Delivery ki tayyari bhi ab se shuru karein — hospital bag, birth plan, pediatrician select karna.

Kya 27 weeks mein baby meri awaaz pehchaan sakta hai?

Haan! Research batata hai ki babies 27 weeks tak maa ki awaaz pehchaanne lagte hain. Baby aapki awaaz sunke heart rate mein changes dikhata hai — yeh bonding ka pehla step hai. Baat karte rahein, gaana gaayein, stories sunayein.

Week 27 Checklist

  • Complete GDM screening this week if not done — 28 weeks is the deadline
  • Confirm Anti-D injection is scheduled for next week if you're Rh-negative
  • Continue all supplements — iron, calcium, folic acid, prenatal vitamins
  • Practice kick counting informally — formal counting starts next week
  • Start packing your hospital bag — the third trimester starts next week
  • Register at your delivery hospital and confirm which doctor will be on call
  • Discuss birth preferences with your doctor — delivery method, pain relief options

Have Questions About Week 27?

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Medically Reviewed

by Babynama Pediatricians · Updated 2026-03-12