Week 31: Your Baby is the Size of a Coconut
Pelvic floor stress may cause minor urine leakage when you laugh, cough, or sneeze. Your ribs may ache from the baby's kicking and stretching. Sleep is fragmented, and you may need to visit the bathroom several times a night.
Your baby at week 31
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Size of a Coconut
Baby Development
The baby's five senses are all functioning now. The brain is processing information from all senses simultaneously. The baby can track light, respond to sounds, taste the amniotic fluid, and feel touch. The lungs and digestive system are nearly mature. The irises can now dilate and constrict in response to light.
Week 31 Highlight: All five of your baby's senses are now functional - they can see, hear, taste, smell, and feel!
Common Symptoms
Tips for Week 31
Do pelvic floor exercises to help with bladder control.
Wear a panty liner if you experience urine leaks.
Practice relaxation techniques to manage anxiety about birth.
Wash and prepare baby clothes and bedding.
South Africa Specific Info
Start preparing your maternity leave paperwork. In South Africa, your employer must continue to make UIF contributions during your employment. Complete form UI-2.8 (available from the Department of Labour or online at ufiling.co.za). Your employer needs to complete the employer section. UIF pays a reduced percentage of your salary during maternity leave.
All Pregnancy Weeks
Frequently Asked Questions
About the Author
Due Date Calculator SA Editorial Team
Our content is reviewed by healthcare professionals familiar with South African maternal health practices. We combine evidence-based medical information with local knowledge to support South African mums throughout their pregnancy journey. Our team includes contributors with backgrounds in midwifery, obstetrics, and maternal health education.
Last reviewed: February 2026