Reaching 37 weeks pregnant is a real milestone. From this point your pregnancy is considered "early term", meaning your baby is very nearly ready to be born. After months of anticipation, the finishing line is finally in sight, and it is completely natural to feel a mix of excitement, impatience and a few nerves all at once.
This week is largely about your baby putting on the final touches and your body quietly preparing for labour. If you have just arrived here from week 36, you will notice many of the same sensations continuing, alongside a growing sense that things could begin at any time. Below we walk through what is typically happening at 37 weeks and what to keep in mind.
Your baby at week 37
By week 37 your baby is roughly the size of a stick of celery or a small winter melon, measuring approximately 48 to 49 centimetres from head to heel and weighing somewhere around 2.8 to 3 kilograms. These are broad averages only, and healthy babies vary considerably in size, so try not to read too much into any single figure.
Most of your baby's major development is now complete. This week is mainly about maturing rather than building. Key changes typically include:
- The lungs continue to mature and produce surfactant, the substance that helps them work smoothly after birth.
- Your baby practises breathing movements, sucking and gripping, rehearsing skills they will need once they arrive.
- A layer of soft body hair, known as lanugo, and much of the waxy protective coating called vernix begin to reduce.
- Fat continues to build under the skin, helping your baby regulate their temperature after birth.
By now many babies have settled into a head-down position ready for birth, though some remain breech or lying sideways, which is worth checking as your due date approaches.
Your body at week 37
Carrying a nearly full-term baby is hard work, and your body will let you know it. Many women notice symptoms becoming more pronounced during the final few weeks. Common and generally normal experiences at 37 weeks include:
- Increased pelvic pressure as your baby drops lower into your pelvis, sometimes described as "lightening" or engagement.
- Braxton Hicks contractions, the irregular practice tightenings that usually ease when you move or rest.
- Frequent trips to the loo, as your baby's head presses on your bladder.
- Trouble sleeping, backache, swollen ankles and feet, and general fatigue.
- Changes in vaginal discharge, which may increase as your body prepares for labour.
Some of these sensations can blur the line between normal late-pregnancy discomfort and the early signs of labour, which is why it helps to know when to seek advice.
What to keep in mind this week
This is a sensible time to make sure your practical preparations are in place. Many parents find it reassuring to have a hospital bag packed, a birth plan sketched out, and a clear idea of how to reach their maternity unit.
It is also important to stay alert to your baby's movements. Contrary to a common myth, babies do not move less towards the end of pregnancy. NHS guidance is clear that you should contact your midwife or maternity unit straight away if you notice any reduction in or change to your baby's usual pattern of movements, at any time of day or night. Never wait to see if things improve.
You should also seek urgent advice if you experience your waters breaking, any vaginal bleeding, severe or persistent headache, sudden swelling, or regular painful contractions. Building a personalised overview of the weeks ahead can help you feel more prepared, and our pregnancy journey planner maps out what typically happens and when.
Scans, tests and appointments
By 37 weeks the main NHS screening scans are well behind you. The routine 20-week anomaly scan takes place at around 18 to 21 weeks, the glucose tolerance test for gestational diabetes is usually offered between 24 and 28 weeks where indicated, and vaccinations such as whooping cough (typically offered from around 16 to 32 weeks) and RSV (offered from 28 weeks) are generally already in hand. Discussions about group B streptococcus may take place in the late third trimester, so this can be a good moment to raise any questions with your midwife.
You will usually have regular antenatal checks around now, where your midwife or obstetrician feels your abdomen to assess your baby's position. If there is any uncertainty about whether your baby is head-down, breech or transverse, an ultrasound can confirm this clearly. At London Pregnancy Clinic our presentation scan is designed for exactly this purpose in the final weeks, giving you and your care team accurate information ahead of birth.
Some parents also value extra reassurance and continuity as their due date nears. Our private midwife support offers dedicated time to talk through your birth preferences, ask questions and feel confident about what lies ahead.
Looking ahead
Week 37 is a moment to slow down where you can, rest often and trust that your body and baby are doing exactly what they need to. Your baby could arrive any time now, though many first pregnancies continue past their due date, so try to stay flexible. Next comes week 38, another step closer to meeting your little one. Above all, listen to your body, keep track of your baby's movements, and reach out whenever something does not feel right.
This article is for general information only and is not a substitute for professional medical advice. Always speak to your midwife, GP or obstetrician about your own pregnancy.
