Track your pregnancy week-by-week

Pregnancy week by week

31 Weeks Pregnant

Length of baby: 41.2cm
Weight of baby: 1.5kg
At week 31, your baby’s brain is going through a rapid development phase and all five sense are now working.


At this stage, you will find yourself sleep deprived as you struggle to get in a comfortable position to sleep in. Not only that, your frequent visits to the washroom would steal precious sleeping moments. If you find yourself struggling to find a comfortable sleeping position, look to maternity pillows to help you get through the night.

Due to your fatigue, you may find yourself being quite the scatterbrain during this period of time. Yes Momnesia (pregnancy brain) is a real thing! This tends to happen when you face a lack of sleep, feel stressed out and when you’re busy. But not to worry, Momnesia is a transient phase as research has shown that capacity of the brain is unchanged during this phase. So what you’ve got to do is to take things at a slower and comfortable pace and focus on the pregnancy and the baby.

Start packing and preparing your hospital bag in the event you need to be at the hospital at a moment’s notice. Here are some items that you might need:

  1. Socks and gloves (if you use them)
  2. Slippers
  3. Healthy snacks to keep your energy up
  4. Outfits for your newborn baby
  5. Nursing attire and nursing bra
  6. Reading materials
  7. Video shows
  8. Phone and phone charger
  9. Wallet
  10. Toiletries
  11. Camera
  12. Breast pads
  13. Maternity pads
  14. Nightshirt (for breastfeeding)
  15. Towels, Hairbrush
  16. Going home outfit

31 weeks pregnant is how many months? 31 weeks pregnant is seven months and three weeks pregnant. You got about eight weeks till your due date.



How big is baby at 31 weeks? Your baby is the size of a lotus root, which is about 41.2cm.

The current weight of your baby is about 1.5kilograms.



This is the weight gain that you must achieve this week.

Underweight(BMI <18.5)  0.44kg to 0.58kg
Normal weight(BMI 18.5 to 24.9)0.39kg to 0.50kg
Overweight(BMI 25 to 29.9) 0.23kg to 0.33kg
Obese(BMI ≥ 30) 0.16kg to 0.25kg



Most of the symptoms that you’ll be experiencing this week is no stranger to you. But just a heads up, these are some of the symptoms you’ll experience as the delivery date closes in. 

Being 31 weeks pregnant, here are some signs and symptom that your body might be experiencing:

  • Braxton Hicks contractions. These often last about 30 seconds but are generally painless, albeit uncomfortable. To ease the discomfort, change positions and hydrate yourself. If you have frequent (more than four times in an hour) or painful contractions, inform your doctor immediately because it could be a sign of preterm labour.
  • Leaking Breasts. You might be leaking premilk, which is the baby’s first food called colostrum. To prevent soiling your clothes, insert padding into your bra.
  • Vaginal discharge. If you see vaginal discharge, be assured that this is normal. However, if the discharge has a mucus texture or has blood, inform your doctor.
  • Lack of breath. You might be struggling to catch your breath as your uterus gets bigger and is pushing against your lungs. Remember not to exert yourself and have more rest.
  • Frequent peeing. The uterus is now pressing against the bladder, and your kidneys are producing more urine. However this is not a sign for you to stop drinking water. Do continue to hydrate yourself. All you got to do is assign more time for these frequent trips to the toilet.
  • Backaches. With the belly increasing in weight, this might take a toll on your back, thereby causing you to experience backaches. Take frequent rests and stretch your back often.


You might find yourself leaking premilk, also known as colostrum, which is the first foods that your baby will consume once out of the womb. If the leaking is severe and it bothers you, insert padding into your bra to prevent it from soiling your clothing.



At this point you should have gained from between 9.5kg and 12.5kg. Remember not to fret over your weight gain because the body needs the nutrients for your baby.

Your belly is now pretty sizeable and affecting your day to day life. Remember to wear comfortable slip on shoes (no heels and no laces), to avoid the hassle of bending down to tie your laces. 



Your baby is now gaining fats under the skin and the arms, legs and body. The little one is plumping up and he or she can also now turn the head from side to side.

The brain is going through a rapid development phase and all five sense are now working.

Baby is highly active, stretching and kicking and moving about which may keep you up at night. Although you may experience some discomfort when the little does the karate kicks and somersaults, see the cup half full! These movements are a sign that the little one is healthy. On the other hand, you may also realise that your baby is sleeping for longer stretches of time.



Reminders for the week:

  • Start researching on pain medication during labour (e.g epidural)
  • Understand the signs of preterm labour
  • Start packing your bag for the hospital