Pregnancy Week 31: Symptoms, Baby Size & What to Expect

Your Baby at Week 31

Your baby measures roughly the size of a coconut (16.2 in) and weighs about ~1.5kg. The major developments this week: All five senses now functioning, brain processing information rapidly, gaining about 230g per week now.

Your baby's five senses are all working now — they can see light, hear sounds, taste amniotic fluid, feel touch, and smell.

Symptoms at Week 31

Common symptoms during week 31 of pregnancy include: Breathlessness (uterus pushing against diaphragm), frequent Braxton Hicks, lower back pain, difficulty finding comfortable positions.

Remember that every pregnancy is unique — you may experience all, some, or none of these symptoms. If anything feels unusual or concerning, don't hesitate to contact your healthcare provider.

📖 Also read: Pregnancy Exercise Yoga Benefits | Pregnancy Week 37 What To Expect

What to Do This Week

Start perineal massage at 34 weeks to help prepare for vaginal delivery. Research shows it can reduce the risk of tearing by up to 10%.

Nutrition & Wellness

Staying well-nourished is crucial at every stage of pregnancy. Focus on folate-rich foods (leafy greens, lentils, fortified cereals), iron (lean meats, beans, spinach), calcium (dairy, fortified plant milks), and omega-3 fatty acids (salmon, walnuts, flaxseed). Stay hydrated with at least 8-10 glasses of water daily.

Frequently Asked Questions

Is it normal to feel [symptom] at week 31?

Yes, most symptoms at week 31 are completely normal. Common experiences include Breathlessness (uterus pushing against diaphragm) and frequent Braxton Hicks. However, contact your doctor if you experience severe pain, heavy bleeding, or persistent vomiting that prevents you from keeping fluids down.

How big is my baby at 31 weeks?

At week 31, your baby is approximately the size of a coconut, weighing about ~1.5kg. All five senses now functioning.

What should I avoid at week 31 of pregnancy?

Continue avoiding alcohol, raw/undercooked meats and fish, unpasteurized dairy, high-mercury fish (shark, swordfish, king mackerel), deli meats unless heated until steaming, and limit caffeine to under 200mg per day.