Twin Pregnancy Week 37: Symptoms, Fetal Development & Body Changes

37 Weeks Pregnant With Twins or Multiples

Being 37 weeks pregnant with twins or multiple babies can leave most mothers frustrated, while their babies are still hoisting comfy inside their body. If you are pregnant with twins or multiples and are in the 37th week of pregnancy, we totally understand how exhausted and tired you are of the seemingly unending pregnancy. Nearly everyone is looking forward to the labour pains, which would signal your baby’s arrival. But, it is necessary to know that those could take a few more days or maybe even a week or more. The delivery of babies in the 37th week of your pregnancy would be great for them, but if they stay in the womb for just some more time, it works further to their benefit. Inducing labour or carrying out a caesarean is undertaken only in cases of future complications, and not simply because you are tired of your pregnancy. Some knowledge about what happens during the 37th week of pregnancy will help you understand why you need to be patient for some more time. Let’s begin with the growth of your babies at 37 weeks.  

Baby Growth at 37 Weeks of Twin or Multiple Pregnancy

It might be surprising to know that your babies are still progressing in their development within your womb, even after 37 weeks have passed already. As a matter of fact, the growth and progress of the babies continue, whether they are inside the womb or outside.

The foetal activities are being rehearsed inside you because the bodies and the brains of your little ones work in sync to establish certainty that everything is working just as expected. Your little ones will now begin to blink their eyes as well. Using their thumbs to suck on would be quite an established habit by now, along with the tendency to close their fist tightly. Also, the amniotic fluid continues to flow through their diaphragm and lungs, as they carry on their breathing practice inside you.

Two essential factors to keep the babies safe in the outside world also begin to achieve a good level of completion around this week and ahead: the immune system and the body’s thermoregulatory system.

In order to keep the body safe from any external infections or factors that could harm the baby, the immune system builds a strong defensive net within, having strengthened it in the previous weeks. Once outside, the nutrients and antibodies present in the breast milk, further work in that regard to keep improving the capability to fight off any invasions.

Similarly, the babies also need to keep their body temperatures to a good degree. The womb and amniotic fluid have constantly been adjusting to make the environment conducive. In the real world, the amount of fat the babies put on is what keeps them warm and helps them stay alive. It is for this primary reason that most doctors prefer deliveries that take place in the 37th week since babies tend to have a pretty good layer of fat by then.

Size of Babies at 37 Weeks of Twin or Multiple Pregnancy

The last stages of pregnancy are pretty intensive in the growth of the children. Knowing that they have very few days at hand before they emerge out into the real world, the gaining of weight and layering of fat surges ahead, reaching a frequency of nearly 30 grams of increase on a daily basis.

This brings your not-so-little ones in the womb to a length of roughly 47-48 centimetres each, and their individual weight is approximately 2.7 kilograms. If you are carrying more than 2 babies, the length and weight per baby maybe a little lower.

Common Body Changes at 37 Weeks of Twin or Multiple Pregnancy

Since your delivery date has inched closer than ever before, most of the changes that occur within your body are mostly in the lower region, affecting the areas surrounding your baby.

  • If lightening has not occurred in the previous week, it will definitely take place sometime this week. Not only would you experience it internally in a strong way, anyone who has been observing you on a daily basis would notice that your belly seems to be weighing down a lot more in the lower section, than the upper one. The descent of the babies, and the change in their orientation, makes it easier for the lungs to breathe. It also gives your body the very shape that defines your pregnancy in the last stages.
  • While the lowering of the babies in the uterus and their approach closer to the birth canal might be a good sign to show your preparation for labour, the sudden shift in weight to a different portion of your body causes your gait and posture to undergo yet another change. It might not seem to be as substantial as you might think, but that shift in the centre of gravity can push you back to relearn a new method of supporting yourself properly. Therefore, you can very well expect some ache in your lower back after lightening occurs. Similarly, with most of the weight in the lower region of the uterus, your bladder would also be bearing the pressure. This will result in your repeated trips to the loo, causing frequent urination. For most women, this is what gets them exhausted and irritated, more than anything else in their 37th week.
  • In the 37th week of the pregnancy, nearly every woman would be looking for signs that might say that the babies are on their way. At the same time, the last thing such women would want is for the body to cry wolf. However, false alarms are not uncommon. Braxton Hicks contractions get stronger and more frequent as your body reaches the stage of being prepared no matter what. These can often leave your moods haywire, causing you to feel like your labour has set in, only to notice the pains to go away once you move around. Similarly, the discharge appearing through the vagina increases and gets thicker. However, if you see any kind of brown or reddish colour in the discharge, it could be a sign of the mucus plug being discharged, which would mean that you can expect delivery in the coming week.

Woman 37 weeks pregnant with twins

Symptoms of Twin or Multiple Pregnancy at 37 Weeks

Some symptoms are at 37 weeks. However, a few old ones might make their return one last time to frustrate you before disappearing forever.

  • Your belly might seem like it is already at the largest size it can ever be. However, your babies are still growing, and that will continue to cause your tummy to expand, and consequently, your skin to stretch further. Therefore, it won’t be of any surprise if you spot some new stretch marks on your belly. Do use creams to help reduce their prominence as recommended.
  • Sexual activity might be continued at this stage but only with your doctor’s approval. This is usually the reason why many women see light signs of blood in their vaginal discharge. While light spotting is totally fine, if the presence of blood seems to be in the form of pools or a proper liquid leak, you need to get checked by your doctor immediately.
  • What seemed to be a thing of the past will come back again in the form of nausea. Yes, this won’t be similar to the morning sickness sensations, but the uterine pressure on the stomach might make you feel like throwing up at times. However, many women have usually had labour quite soon after the signs of nausea began to manifest. Therefore, this might, in fact, be a welcome symptom for most at this stage.

Belly at 37 Weeks Pregnant With Twins or Multiples

The descent of the babies would be the biggest change your belly would undergo this week. Paired with a slight sensation of feeling heavy and a light ache, it would be balanced with the ability to heave in deep breaths of air.

At times, labour may even set in before your belly lowers, which is also quite normal. The baby already has a little place inside you and may begin to push its way outside early on. The only factor is that this could cause the kicks of the babies to be felt by your ribs, which could be painful.

37 Weeks Pregnant With Twins or Multiples – Ultrasound

Doctors would rarely conduct an ultrasound at this stage unless they are monitoring a complicated pregnancy and think it is required. Most scans simply take a look at how close the babies are to begin the process of emerging outside.

Diet at 37 Weeks of Twin or Multiple Pregnancy

Having light and nutritious food items, such as fruit smoothies, baked chips or salads, would be great to keep your moods high this time. Eating a little spicy food such as curries or other meat items might even help in inducing labour. Fresh pineapple juice is highly recommended since it helps in softening the cervix.

Delivery at 37 Weeks of Twin or Multiple Pregnancy

Most doctors recommend delivering twins in the 37th week of your pregnancy since it has known to substantially reduce the risks of stillbirth or death of newborn babies.

If the twins stay within the womb for longer than needed, the constricted space can turn out to be fatal for them. But if they emerge out sooner, their survival rate doesn’t seem to be good, too. In that matter, the 37th week tends to be in the sweet spot, satisfying both conditions effectively.

Pregnancy Care Tips for Twin or Multiple Pregnancy at 37 Weeks

Your babies are nearly here. All you’d need now are quick, handy tips to keep things intact.


  • Make a quick check if your house is in the right condition to bring the babies home.
  • Feel free to ask your partner to massage you or help you out with any activity.


  • Do not panic at any sign that might seem out of the ordinary.
  • Avoid being anxious and stressing about when your due date might arrive.

What You Need to Shop for at 37 Weeks of Twin or Multiple Pregnancy

Once you are at the hospital, you can ensure staying comfortable using these products that you can easily purchase:

  • A power bank to keep your phone charged and connect with your loved ones.
  • Earphones to listen to music that can calm you down.

Most items you would need in this week, such as nursing bras, robes, additional gowns, towels, baby clothing, diapers, soft tissues, etc. must have already been bought in the previous weeks. However, if you have forgotten an essential product, you could ask someone to get it for you or order it in.

Doctors agree that in a woman who is 37 weeks pregnant with twins or multiples, foetal development has reached a stage where babies can survive in the real world without much trouble. Prepare yourself and look forward to the wonderful experience of your life when giving birth to your little lovelies.

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