Pregnancy Week 38: Symptoms, Baby Size & What to Expect

Your Baby at Week 38

Your baby measures roughly the size of a leek (19.6 in) and weighs about ~3.1kg. The major developments this week: All organ systems mature and functioning, meconium (first poop) accumulating in intestines, shedding vernix and lanugo.

Your baby is now shedding the vernix and lanugo that protected their skin throughout pregnancy — they may swallow some of it, which becomes part of their first bowel movement (meconium).

Symptoms at Week 38

Common symptoms during week 38 of pregnancy include: Lightning crotch, irregular contractions, difficulty sleeping, extreme nesting, pelvic pressure, cervical ripening (effacement/dilation).

Remember that every pregnancy is unique — you may experience all, some, or none of these symptoms. If anything feels unusual or concerning, don't hesitate to contact your healthcare provider.

📖 Also read: Labor Stages Explained | Pregnancy Cravings Aversions Management

What to Do This Week

Time your contractions using the 5-1-1 rule: go to the hospital when contractions are 5 minutes apart, lasting 1 minute each, for at least 1 hour. But if your water breaks, go immediately regardless of contractions.

Nutrition & Wellness

Staying well-nourished is crucial at every stage of pregnancy. Focus on folate-rich foods (leafy greens, lentils, fortified cereals), iron (lean meats, beans, spinach), calcium (dairy, fortified plant milks), and omega-3 fatty acids (salmon, walnuts, flaxseed). Stay hydrated with at least 8-10 glasses of water daily.

Frequently Asked Questions

Is it normal to feel [symptom] at week 38?

Yes, most symptoms at week 38 are completely normal. Common experiences include Lightning crotch and irregular contractions. However, contact your doctor if you experience severe pain, heavy bleeding, or persistent vomiting that prevents you from keeping fluids down.

How big is my baby at 38 weeks?

At week 38, your baby is approximately the size of a leek, weighing about ~3.1kg. All organ systems mature and functioning.

What should I avoid at week 38 of pregnancy?

Continue avoiding alcohol, raw/undercooked meats and fish, unpasteurized dairy, high-mercury fish (shark, swordfish, king mackerel), deli meats unless heated until steaming, and limit caffeine to under 200mg per day.