What are warning signs at 36 weeks pregnant?

Severe headache that won't go away with acetaminophen — preeclampsia.; Vision changes — blurred vision, light flashes, vision loss.; Severe right-upper-quadrant pain — HELLP syndrome.; Sudden swelling of face, hands, or feet.; Reduced fetal movement — fewer than 10 kicks in 2 hours.; Vaginal bleeding, fluid leakage, or persistent contractions.; Severe shortness of breath at rest or chest pain.; Fever over 100.4°F.; Seizure — eclampsia, life-threatening.;

Third trimester · Pregnancy week by week

Week 36 of pregnancy

Q: How big is the baby at 36 weeks?

size of a head of romaine. The fetus is gaining ~1 oz per day now. Lungs are nearly mature. Vernix continues to coat the skin. Hair on the head is well-developed.

Baby is the size of a head of romaine. About 18.70 inches, 2600g.

Week 36 — fetus considered late preterm if delivered now. Black women face the highest preterm-birth rates in the U.S. (~14% vs. 9% white per CDC) — every late-trimester week of gestation matters. Source

What's happening with the baby

The fetus is gaining ~1 oz per day now. Lungs are nearly mature. Vernix continues to coat the skin. Hair on the head is well-developed.

What's happening for you

Many women report 'lightening' as the fetus drops into the pelvis — easier breathing but more pelvic pressure. Increased pelvic pain, especially in the pubic area (pubic symphysis).

Common (normal) symptoms this week

Pelvic pressure, easier breathing (after lightening), increased Braxton Hicks, pelvic pain, frequent urination, sleep disturbance.

Call your OB or 911 if

Severe headache that won't go away with acetaminophen — preeclampsia.
Vision changes — blurred vision, light flashes, vision loss.
Severe right-upper-quadrant pain — HELLP syndrome.
Sudden swelling of face, hands, or feet.
Reduced fetal movement — fewer than 10 kicks in 2 hours.
Vaginal bleeding, fluid leakage, or persistent contractions.
Severe shortness of breath at rest or chest pain.
Fever over 100.4°F.
Seizure — eclampsia, life-threatening.

Why this week matters for Black families

The final weeks and the immediate postpartum period are where Black-maternal-mortality cases cluster. Postpartum hemorrhage rates are 3 to 4 times higher in Black women per ACOG Practice Bulletin 183, and recognition is documented to be slower. If after delivery you soak a pad in under an hour, pass golf-ball-sized clots, feel lightheaded standing up, or your heart races at rest — go to the ED, not to your OB's office for an appointment. Postpartum preeclampsia can develop up to 6 weeks after birth and is repeatedly missed. The Serena Williams near-miss in 2017 wasn't an outlier — it was the median pattern.

What to do this week

Weekly OB visits with cervical checks. GBS results back. Confirm hospital pre-registration complete. Pack final hospital bag. Confirm childbirth class completion. Discuss postpartum plan: support, lactation, mood-disorder screening.

Pregnancy / baby

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References

CDC NCHS Preterm Birth Data.
ACOG Committee Opinion 819 — Postpartum Toolkit.

Last medically reviewed: April 25, 2026.

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