Week 31 of 40 Third Trimester

Week 31: Your Baby Can Turn Their Head

Your baby can now turn their head from side to side, and all five senses are functioning to varying degrees.

Baby is the size of
Coconut
41.1 cm
1,502 g
78% through your pregnancy
Week 30 All Weeks Week 32
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Baby's Development

Your baby can now turn their head from side to side, and all five senses — sight, hearing, taste, touch, and even smell — are functioning to some degree, even within the womb.

Amniotic fluid levels are at their highest relative to baby's size around now, giving plenty of room for the increasingly purposeful movements you're likely feeling.

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Changes in Your Body

Your uterus continues its steady growth. Many women notice their baby settling into a more consistent position around this time, which can sometimes be felt as a particular side of the belly being more active or having more pressure.

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Common Symptoms

Common at 31 weeks:

  • Strong movement
  • Backaches and pelvic pressure
  • Shortness of breath
  • Trouble sleeping
  • Swelling
  • Braxton Hicks contractions
  • Increased Braxton Hicks frequency for some
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Nutrition This Week

Continue regular, balanced meals. If you're finding it hard to eat large meals due to limited stomach space, smaller, more frequent meals throughout the day can help meet your nutritional needs comfortably.

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Safe Exercises

Continue gentle movement as comfortable. Prenatal-specific stretches targeting the hips and lower back can offer real relief as your body prepares for labor.

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Medical Checklist

This week:

  • Finalize your hospital bag if you haven't
  • Confirm your pediatrician choice if you haven't already
  • Continue tracking fetal movement
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Doctor Visit Guide

Your doctor may start discussing your baby's position in the womb at these visits, as this becomes more relevant as you approach the final weeks before delivery.

Frequently Asked Questions

As your baby grows and amniotic fluid levels remain high, there's increasing pressure on your pelvis and bladder. This typically continues and can intensify as your baby eventually moves into a head-down position for delivery.

There's evidence that the sense of smell begins developing prenatally, and that babies may respond to strong flavors and scents that reach the amniotic fluid through the mother's diet, though this sense becomes much more functional after birth when air actually reaches the nasal passages.

Occasional, irregular Braxton Hicks contractions are normal and tend to increase somewhat in frequency in the third trimester. If they become regular, painful, or are accompanied by other symptoms like fluid leakage, contact your doctor, as this could indicate preterm labor.
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