Third trimester · Week 39 of pregnancy
39 weeks pregnant: body, feeding, and care
Full term. The brain continues developing at a rapid pace, and the chest is more prominent as the body fills out.
Body and care — week 39
Full term. The brain continues developing at a rapid pace, and the chest is more prominent as the body fills out. Development notes on this page are general education summarized from ACOG patient-education material; they describe typical development, not your pregnancy specifically. Anatomy and growth are confirmed by your own provider and ultrasounds.
This week's checklist
- Note one body question — sleep, appetite, movement, comfort — and bring it to your next prenatal visit rather than searching it at 3 AM.
- Keep prenatal appointments on the schedule your provider sets; bring your questions list.
- Anything that worries you — bleeding, pain, reduced movement later in pregnancy — goes to your provider or urgent care first, never to a website.
Week 39 questions
What is happening at 39 weeks pregnant?
Full term. The brain continues developing at a rapid pace, and the chest is more prominent as the body fills out.
Which trimester is week 39?
Week 39 falls in the third trimester (weeks 28–42). See the third trimester hub.
How is a due date calculated?
A due date is typically estimated as 280 days (40 weeks) from the first day of the last menstrual period. It is an estimate — try the client-side due-date calculator; your provider's dating outranks it.
Educational information only — not medical advice. Every pregnancy and every baby develops on their own timeline. If you have any concern, talk to your obstetric provider or your baby's pediatrician.