Third trimester · Source-backed weekly guide

Pregnancy week 31

Pregnancy week 31: a source-backed guide to development, possible body changes, useful next steps, and questions for your prenatal care team.

By BabyToBloom EditorialReviewed September 20, 2026
Expectant parent relaxing in a sunlit nursery

Development

What is developing around week 31

This transition into the third trimester includes continued brain, lung, and sensory development. Eyelids can open around this stage, while growth and maturation continue.

Your body

Changes you may notice

Third-trimester changes can include shortness of breath, heartburn, swelling, sleep difficulty, urinary frequency, breast changes, and contractions. Your clinician can help distinguish expected discomforts from symptoms that need evaluation.

Symptoms vary widely. Absence, presence, or intensity of a symptom cannot confirm that a pregnancy is progressing normally.

This week’s focus

A practical next step

Discuss feeding goals without pressure and identify qualified lactation or feeding support before birth.

  • Discuss feeding goals without pressure and identify qualified lactation or feeding support before birth.
  • Keep appointments and follow the plan created with your prenatal care professional.
  • Save new symptoms and questions in one place so changes are easier to explain.

Prenatal visit

Questions worth bringing with you

  • What should I understand or prepare during pregnancy week 31?
  • Which symptoms should make me call you now rather than wait for my next appointment?
  • What tests, vaccines, medicines, or decisions are coming next in my care plan?
Build your appointment question list →

Sources

BabyToBloom uses authoritative public-health sources and identifies the source checkpoints behind developmental statements. Individual development and clinical schedules vary.

Guidance that moves with you.

Save your due date and priorities for a personalized weekly plan without entering the same information twice.

Personalize week 31
Pregnancy Week 31: Development, Changes & Questions | baby to bloom OS