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Third Trimester

38 Weeks Pregnant

Your baby is the size of a Leek ๐ŸŒฟ

๐ŸŒฟ
Written by
Ashok Kumar Poudel
Health & Wellness Writer
Medically reviewed by
Dr. Bina Basnet
MBBS, MD โ€” Gynecologist & Obstetrician
Last reviewed
๐Ÿ“
Size
Leek
๐Ÿ“
Length
49.8 cm
โš–๏ธ
Weight
3.1 kg
๐Ÿ—“๏ธ
Trimester
Third
โฑ๏ธ
Week
38 of 40

๐ŸŒฑ Baby Development at Week 38

All organs are fully developed and in place, with only the brain and lungs adding finishing touches. Your baby has a firm grasp, smooth plump skin, and is nestled low in the pelvis in birth position.

Full term!Vocal cords readyFinal antibody transferBirth window approaching

๐Ÿคฑ Common Symptoms

โ—Nesting instinct strong
โ—Increased pelvic pressure
โ—Mucus plug may pass
โ—Irregular contractions
โ—Anxiety and excitement

๐Ÿฅ— Nutrition Tips

  • Light meals easy to digest
  • Avoid constipating foods
  • Stay well-hydrated

๐Ÿƒโ€โ™€๏ธ Exercise Tips

  • Walking is excellent for bringing on labor
  • Raspberry leaf tea now most potent
  • Rest and sleep when possible

๐Ÿฅ Medical Tests & Appointments

Weekly prenatal visitsNon-stress test if post-dates approachingCervical checks

๐Ÿ”ฌ Hormone Changes

Estrogen now clearly dominates over progesterone, a hormonal shift that helps trigger labor. Rising oxytocin increases uterine sensitivity, so contractions become more coordinated and effective.

๐Ÿ“– Week 38 Pregnancy โ€” In-Depth Guide

At week 38, your baby is about the size of a mini watermelon โ€” roughly 19.6 inches long and around 6.8 pounds. Your babyโ€™s organs are fully developed and ready, with only the brain and lungs putting on finishing touches. The grasp is firm, the lungs are strong, and your baby has a good layer of fat for temperature regulation. For you, week 38 is often a strange mix of impatience and last-minute nesting: the nursery is ready, the bag is packed, and now it is a waiting game. Braxton Hicks may intensify, sleep is fragmented, and every new sensation gets analyzed. Weekly visits continue, and your provider is watching for signs that labor is approaching. One more week to full term โ€” you are so close.

๐Ÿ‘ถBaby Development at Week 38

Your babyโ€™s organs are now fully developed and in place โ€” the liver, kidneys, digestive system, and heart are all ready for independent function. The brain and lungs continue their final maturation, adding the last layers of complexity that support breathing coordination and newborn reflexes. Your baby has a firm grasp now and can hold onto a finger with surprising strength.

Fat accumulation is nearly complete, giving your baby smooth, plump skin and the insulation needed to maintain body temperature after birth. The vernix is mostly gone, and any remaining lanugo is minimal. Your babyโ€™s intestines have accumulated meconium, and the digestive system is primed for that first feeding.

Your babyโ€™s lungs are producing ample surfactant, and breathing practice continues around the clock. The brain is developing the sleep-wake regulation that will shape newborn patterns โ€” though newborns will still wake every few hours to feed. Eye color at birth may not be final; many babiesโ€™ eyes darken over the first months as melanin develops.

Space could not be tighter, so movements are limited to stretches, rolls, and hiccups โ€” but they should still follow your babyโ€™s usual pattern. Your baby is nestled low in the pelvis, head engaged, in the classic birth position. The umbilical cord, now about 20 inches long, may be wrapped around the neck or body โ€” this is common and usually harmless, as providers check for it at delivery.

๐ŸฉบYour Body: Common Symptoms at Week 38

โ–ธ Nesting Instinct

A powerful urge to clean, organize, and prepare can surge now. It is normal โ€” just pace yourself, lift nothing heavy, and accept help.

โ–ธ Trouble Sleeping

Between discomfort, bathroom trips, and racing thoughts, restful sleep is rare. Daytime naps and quiet rest periods help bridge the gap.

โ–ธ Itchy Belly

Stretched-to-the-limit skin can itch intensely. Cool compresses, fragrance-free moisturizers, and loose clothing bring relief.

โ–ธ Clumsiness

Your balance is at its most challenged and joints at their loosest. Slow down on stairs, wear flat shoes, and hold railings.

โ–ธ Braxton Hicks Contractions

Practice contractions may be strong enough to make you wonder. Time them: if they become regular and intensify, it may be the real thing.

โ–ธ Leaking Colostrum

Your breasts may leak the thick, yellowish first milk. Nursing pads in your bra keep you comfortable and dry.

๐ŸฅMedical Tests & Checkups at Week 38

Weekly prenatal visits continue with the familiar routine: blood pressure, urine check, fundal height, fetal heart rate, and cervical exam. Your provider is assessing cervical dilation, effacement, and your babyโ€™s station (how low the head sits) โ€” all clues about how your body is preparing, though none can predict the exact start of labor.

Your provider will also reconfirm your GBS status and the antibiotic plan for labor if needed, review your birth plan once more, and make sure you know exactly when to head to the hospital or call. If you have any high-risk factors, additional monitoring such as non-stress tests may begin. This is a good week to ask any final questions โ€” no question is too small this close to delivery.

๐Ÿฅ—Nutrition & Movement Tips

Eat small, frequent meals โ€” a full stomach is uncomfortable with labor possibly near.

Stay hydrated; keep a water bottle with you at all times.

Choose iron- and protein-rich foods to keep energy up for labor.

Take gentle walks โ€” movement may help encourage labor naturally.

Practice your labor breathing and relaxation techniques daily.

Rest with feet up often; conserve strength for what is coming.

โœ…Week 38 Checklist

โœ“Keep the hospital bag in the car and gas tank at least half full.
โœ“Make sure your birth partnerโ€™s phone is charged and ringer is on.
โœ“Prepare the house: clean sheets, stocked fridge, easy meals.
โœ“Write down your providerโ€™s after-hours number where both of you can find it.
โœ“Do something enjoyable and relaxing โ€” a walk, a movie, a long bath.

๐Ÿ“ŒWhen to Call Your Doctor

Labor can begin any day now, so keep these guidelines close. When in doubt, call โ€” triage nurses answer these questions all day long.

Regular contractions (about 5 minutes apart for an hour) that keep intensifying.

Your water breaks โ€” note the time, color, and amount of fluid.

Decreased fetal movement or a break in your babyโ€™s usual pattern.

Bright red bleeding, severe headache, vision changes, or sudden swelling.

Fever, constant severe abdominal pain, or green-tinged fluid (call immediately).

๐Ÿ“… Track Your Pregnancy:Due Date CalculatorSymptoms by WeekTrimester Guideโ† Week 37Week 39 โ†’

Frequently Asked Questions

Common questions answered by our medical team

At 38 weeks, your baby is approximately the size of a Leek (๐ŸŒฟ). All organs are fully developed and in place, with only the brain and lungs adding finishing touches. Your baby has a firm grasp, smooth plump skin, and is nestled low in the pelvis in birth position.

โ† Week 37Calculate Your Due DateWeek 39 โ†’

๐Ÿ”— Related Third Trimester Resources

Second Trimester
Weeks 14โ€“27 guide
Trimesters Explained
Guide to all three trimesters
Symptoms Week by Week
What to expect each week
How Many Weeks Pregnant Am I?
Calculate your pregnancy weeks

All Pregnancy Weeks

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