Week 30 · 3rd trimester

Pregnancy Week 30: What to Expect

Baby's development, your body's changes, common symptoms, what to eat, and what to do this week.

Baby's size this week: Cucumber or large cabbage (~40 cm; about 3 lb)

Baby's development at week 30

Baby's brain shows complex sleep states. Lungs continue developing — surfactant production matures, alveoli multiply. Baby is gaining weight rapidly. Baby's eyes can distinguish dim and bright. Baby practices breathing motions, taking amniotic fluid in and pushing it out. Baby's bone marrow takes over red blood cell production.

What's happening in your body

Your uterus is about 4 inches above the belly button. Bump is huge. Possible breast leakage (colostrum — the thick, yellowish first milk). Heartburn. Sleep hard. Possible swelling. Possible Braxton Hicks. Possible mild dizziness from blood pressure shifts. Possible mild shortness of breath.

Common symptoms at week 30

Possible breast leakage (colostrum). Heartburn. Sleep issues. Possible swelling in feet, ankles. Possible carpal tunnel. Possible Braxton Hicks. Strong fetal movements. Possible mild breathlessness.

When to call your provider

Severe swelling especially in face and hands, persistent headaches, vision changes, upper-right abdominal pain — preeclampsia warning. Severe pelvic pain, decreased fetal movement, painful regular contractions.

How to feel better this week

3rd-trimester growth scan may be done now or in coming weeks if there is concern about baby's size, fluid levels, or position. Continue Kegels. Side sleeping with pillows. Walk daily. Apply lotion. Use breast pads if leaking.

Nutrition focus for week 30

Continue iron, calcium, protein, healthy fats. Add foods rich in vitamin K (leafy greens) — needed for blood clotting at delivery. Stay hydrated.

For your partner

Be aware of breast leakage — it can be unexpected. Help your partner with pads, comfortable bras.

This week's to-do

Use breast pads if leaking. Apply belly lotion.

Is this normal?

Colostrum is your first milk — yellowish, thick, nutrient-dense. Some people see it weeks before birth (or postpartum). Both are normal. It is rich in antibodies; the small amount baby gets in the first day is exactly the right amount.

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Medical disclaimer: This content is for general educational purposes only and is not a substitute for medical advice. Always talk to your healthcare provider about your specific pregnancy. If you have concerning symptoms, do not wait — call your provider or go to the emergency department.

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