What are warning signs at 34 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 34 of pregnancy

Q: How big is the baby at 34 weeks?

size of a butternut squash. The fetus is over 17 inches long. Lungs continue maturing. Most fetuses are head-down. Eyes can open and close.

Baby is the size of a butternut squash. About 17.70 inches, 2100g.

Week 34 — the fetus is essentially viable. Black women face higher rates of placental abruption per the Bryant 2010 review (PMID 20567176) — late-trimester bleeding requires immediate evaluation. Source

What's happening with the baby

The fetus is over 17 inches long. Lungs continue maturing. Most fetuses are head-down. Eyes can open and close.

What's happening for you

Lots of pelvic pressure. Many women have difficulty sleeping. Some experience increased breast tenderness as colostrum production ramps up.

Common (normal) symptoms this week

Pelvic pressure, sleep disturbance, increased Braxton Hicks, breast colostrum, frequent urination, mild swelling.

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

Group B Strep screening (35–37 weeks) is critical and Black women are screened at slightly lower rates per the CDC. If you haven't been swabbed by week 37, ask. Untreated GBS-positive delivery is a leading cause of neonatal sepsis. Also: confirm that your hospital is your delivery hospital, that your OB has privileges there, and that any complications protocol is in place. The 'doula in the room' decision matters most here — Black women with continuous doula support have measurably lower complication rates and lower rates of unwanted cesarean per multiple systematic reviews.

What to do this week

GBS test typically at 35–37 weeks — confirm scheduled. Continue weekly BP tracking. Install car seat. Pack hospital bag completely. Do hospital pre-registration if not done. Discuss labor positions and pain-management options with OB.

Pregnancy / baby

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References

Bryant 2010 — Placental abruption disparities
ACOG Committee Opinion 766 — Approaches to Limit Intervention.

Last medically reviewed: April 25, 2026.

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