Third trimester · Week 31 of pregnancy
31 weeks pregnant: body, feeding, and care
The fetus can turn its head, process information, and track light. Movements may feel different as space gets tighter.
Body and care — week 31
The fetus can turn its head, process information, and track light. Movements may feel different as space gets tighter. 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 31 questions
What is happening at 31 weeks pregnant?
The fetus can turn its head, process information, and track light. Movements may feel different as space gets tighter.
Which trimester is week 31?
Week 31 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.