You’re 31 weeks pregnant—congratulations! Baby is a 31-week resident in the womb and weighs about 1.5kg (3.5 lbs). It’s about the size of a coconut, roughly 40 – 42 cm (16 inches or so) long. Their major organs, including the lungs, are continuing to mature, and they’re busy gaining fat to regulate their temperature after birth. You may feel more frequent kicks and movements as your little one stays active.
From this point, you could be as close as six weeks from the big day. But before we get there, your baby still has quite a bit of growing to do, and you’re going to feel that progress rapidly.
As your due date approaches, you might experience symptoms like Braxton Hicks contractions, backaches, or shortness of breath. Staying hydrated, maintaining good posture, and taking breaks to rest can help ease discomfort. Let’s dive into what to expect at 31 weeks pregnant and share some tips for staying healthy and prepared during this exciting time.
Your baby at 31 weeks
In utero, babies at 31 weeks will gain weight more rapidly – up to another 1 – 2 kilograms (3 – 5 lbs). As a result, the baby will seem to get plumper and look less wrinkled during this time. All this requires more periods of sleep, but when the baby’s awake, they’ll be more noticeably active.
Baby moves around more, sometimes changing position, and even starts actively sucking on their thumb. There will also be more amniotic fluid present. This is because the baby has started peeing!
Hearing voices
Talking to your baby is always a good idea. Studies show that babies can start to hear and recognise voices from outside at this stage. Psychologists believe that this is a good time for parents and siblings to talk to your belly, suggesting that it can help bond the family.
Brain development
The accelerated growth of a 31-week old foetus means that the baby is entering REM sleep more regularly. But it is also able to start regulating its own body processes like temperature. It is able to use its senses, and with the exception of smell, is able to perceive the world around them.
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Your body: What to expect at 31 weeks pregnant
You’re pregnant at 31 weeks, and your body knows it’s not long to go now. But over the last 7 months, the adjustments and transformations have been noticeable.
Here’s what you can expect at this time:
- Braxton Hicks contractions. Your womb “tightens” from time to time with these perfectly normal and painless contractions. They are nothing to worry about unless they become painful and regular. In that case, talk to your doula, midwife, or doctor.
- Carpal Tunnel Syndrome. It’s not just a symptom of too much office work. During pregnancy, your hands and fingers may become numb or tingly more easily. Try shaking them out often.
- Cramps and heartburn. A very common side-effect of pregnancy is the occasional heartburn and cramping.
- Feeling off-balance and clumsy. Your body is carrying a lot of extra weight and may undercompensate for balance and dexterity. All you can do is take a little extra care and try to avoid potentially unsafe situations. Including unassisted stair climbing, ladders, and carrying heavy items.
- Don’t worry about tiredness. Your body is working overtime. So if you’re feeling fatigued, go with it. Naps and breaks are your privileges at this time. Take advantage when you can.
- You might develop a “pregnancy brain”. It’s often a topic of fun and games, but forgetfulness or odd-logic decisions are a real thing during pregnancy. In part, it’s the changing balance of hormones that drive this. But it may be exacerbated by sleep deprivation (which might get worse as your pregnancy proceeds). But it’s temporary, and will be good for a few stories at dinner time.
Taking care of yourself during week 31 of pregnancy
In all of the excitement of pregnancy, it’s easy to forget that taking care of yourself is as important as taking care of the baby. In fact, one helps considerably with the other.
There are a few things you can do:
- Try light pilates. A strong body will make for a better birth experience all around. Certain forms of pilates or yoga do show immense benefits during pregnancy, and even at 31 weeks, those able to exercise lightly definitely should. Aside from the physical leg-up, so to speak, you’ll also feel better mentally and emotionally.
- Continue with Kegel exercises. Your doctor has probably told you by now to keep up the Kegel exercises. Remember to do them properly, and be especially aware–doing these incorrectly can lead to additional back pain.
- Sleep on your side. By now you’ve probably realised that sleeping on your side is much better than sleeping on your back – in fact, it’s medically advised. Studies show that sleeping on your back has an impact on the oxygen supply to your baby. Just be sure to pack a few pillows in strategic places to assist.
- Up your antenatal care. Your medical professional will be keeping an eye on the size and position of the baby at this point. Don’t worry, there isn’t necessarily a problem if the baby isn’t in birth position yet, but they’ll be able to monitor this easily from this point. Your urine will also be tested for protein and your blood pressure will be monitored for safety.
- Moisturise. Areas of your body will be expanding. And so will your skin. Welcome to stretch marks! Don’t worry, they’re generally temporary. Your skin may also dry out or become itchy. So moisturise generously.
- Contemplate some decisions. If you haven’t considered them yet, some questions would be worth considering from this point. For example, will you breastfeed or go the formula route? Your decision may impact whether you take lactation classes, in this case.
FAQs: 31 Weeks Pregnant – Baby’s Growth, Pregnancy Tips & What to Expect
How big is my baby at 31 weeks?
By 31 weeks, your baby is about the size of a coconut, measuring roughly 40–42 cm from head to heel and weighing around 1.5–1.7 kg. These measurements can vary slightly from one pregnancy to another.
What developments are happening with my baby now?
Your baby’s brain and lungs continue to mature rapidly. Their senses are increasingly refined, and they can likely detect light and hear sounds more distinctly. Muscle tone also improves, which may make movements feel stronger.
Which symptoms might I experience at 31 weeks?
Common symptoms include backaches, heartburn, leg cramps, and mild swelling in your ankles or feet. You may also notice Braxton Hicks contractions becoming more frequent as your uterus prepares for labour.
Is weight gain expected at this stage?
Yes, most women continue to gain weight in the third trimester. If you have concerns about your rate of weight gain, speak to your healthcare provider for personalised advice.
How do I manage back or pelvic pain at 31 weeks?
Maintain good posture, do gentle prenatal exercises (such as swimming, walking, or yoga), and use supportive cushions or a pregnancy pillow when resting. If pain becomes severe, contact your midwife or doctor.
What if I feel fewer baby movements?
As space becomes more limited, your baby’s movements might feel different but should remain fairly regular. If you notice a sudden drop in movement or a change in your baby’s usual pattern, seek medical advice promptly.
How can I cope with heartburn or indigestion?
Eating smaller meals, avoiding lying down immediately after eating, and reducing spicy or greasy foods can help. If heartburn is severe or persistent, discuss safe treatments with your healthcare provider.
Is it still safe to exercise at 31 weeks?
In most cases, moderate, low-impact exercise remains beneficial for both physical and mental wellbeing, provided there are no complications. Always follow your healthcare provider’s guidance regarding exercise.
When should I start thinking about my birth plan?
Many expectant parents begin refining their birth plan around the start of the third trimester. Consider discussing pain relief options, birthing positions, and any preferences you have with your midwife or doctor.
What can I do if Braxton Hicks contractions become uncomfortable?
Stay hydrated, try changing position, or take a warm bath to help ease the discomfort. If contractions become intense, painful, or regular, contact your healthcare provider, as this may be a sign of preterm labour.
How can I manage swelling at 31 weeks?
Mild swelling (oedema) in your legs or feet is common, especially later in the day. Elevate your feet when possible, stay hydrated, and wear comfortable shoes. If swelling is severe or sudden, particularly in your face or hands, seek medical advice.
When should I call my healthcare provider?
Contact your midwife or doctor immediately if you experience heavy bleeding, severe pain, fluid leakage, or notice a significant change in baby movements. It’s always best to seek professional advice if you’re concerned.
Disclaimer: The information above is for general educational purposes and should not replace personalised medical advice. Always consult a qualified healthcare professional about any health concerns or questions related to your pregnancy.
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