Week 31 Size: Coconut
About the size of a coconut.
Relative Visual Scale
Solid circle represents your baby's size. Dotted circle shows the full-term week 40 size threshold.
Baby's Development
The baby is going through a major growth spurt. The nervous system can process more complex information. The baby can turn their head from side to side and is moving frequently.
Weekly Milestones
- ✦ Complex Sensory Processing
- ✦ Fetal Head Turning
Your Body & Symptoms
Your breasts may leak yellow, sticky fluid called colostrum (early milk). Your lung capacity is restricted, making you catch your breath easily.
Common Symptoms this Week
Doctor & Care Recommendations
- ✓ Use nursing pads in your bra if leakage is bothersome.
- ✓ Take slow, deep breaths when you feel short of breath.
- ✓ Inquire about infant CPR classes in your area.
PregWeeks
CHECKLISTUltimate Hospital Bag & Birth Plan
Print-Ready PDFThe Ultimate Hospital Bag Checklist & Birth Plan PDF
Prepare for labor with confidence. Our doctor-reviewed checklists ensure you don't forget any newborn or partner essentials in the hospital delivery room.
- ✓ Clinical OB-GYN Approved List: Separate checklists detailing exactly what mom, partner, and newborn baby require for a standard 3-day recovery stay.
- ✓ 10-Second Birth Preference Builder: Minimalist visual plan templates designed to help delivery nurses digest your labor choices instantly on check-in.
- ✓ 1-Click Offline Access: High-resolution, print-ready document formatted to download directly to your mobile device for offline reference in the clinic.
Weekly Health Guides & Resources
Third Trimester Guide
Read comprehensive clinical milestones, screening checklists, and developmental guidelines for this phase.
Track & Relieve Symptoms
Learn why symptoms occur, home remedies, and clinical indicators for this week:
Food Safety Checklists
Verify safety statuses, listeria and mercury risks, and safe alternatives for:
Frequently Asked Questions: Week 31
Evidence-Based Clinical Sources for Week 31
PregWeeks is dedicated to medical transparency. Every milestone, symptom tip, and fetal development guideline for Week 31 is sourced directly from clinical guidelines published by leading obstetric authorities. Read more about our editorial methodology on our Medical Sources page.
Gestational Hypertension and Preeclampsia (Practice Bulletin No. 202)
ACOGClinical guidelines for monitoring blood pressure, proteinuria, and warning signs of preeclampsia during third-trimester prenatal care.
View Clinical Guideline ↗Fetal Growth Restriction (Practice Bulletin No. 219)
ACOGRecommendations for measuring fundal height, tracking fetal growth scales, and diagnosing growth limitations in the third trimester.
View Clinical Guideline ↗WHO Guidelines on Physical Activity and Sedentary Behaviour
WHOGlobal physical activity standards for pregnant women to support circulation, minimize excessive weight gain, and prepare for labor.
View Clinical Guideline ↗Get weekly pregnancy updates
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