If you’re 37 weeks pregnant, you’ve just crossed into what doctors call “early term” and it’s worth understanding exactly what that means, because it’s easy to confuse with “full term.” Early term runs from 37 to 38 weeks pregnant ; full term doesn’t begin until 39 weeks. Your baby is considered safely developed enough to be born this week if labour starts, but a few more weeks in the womb still give the lungs and brain valuable extra time to mature.
This guide covers everything you need to know this week: your baby’s size and development, the symptoms you’re likely feeling, the real signs that labour is near, and exactly when to call your doctor.
What Does “Early Term” Mean at 37 Weeks Pregnant?
Many people assume any pregnancy past 37 weeks is “done cooking,” but that’s not quite accurate. Medical guidelines split the final weeks of pregnancy into distinct stages:
- Early term: 37 weeks 0 days to 38 weeks 6 days
- Full term: 39 weeks 0 days to 40 weeks 6 days
- Late term: 41 weeks 0 days to 41 weeks 6 days
Babies born during early term are generally safe and healthy, but research shows they have a slightly higher chance of needing help with breathing, feeding, or blood sugar regulation compared to babies born at full term. That’s why, unless there’s a medical reason to induce early, most doctors will let a pregnancy continue naturally toward 39 weeks rather than schedule an early delivery.
Baby Development at 37 Weeks
Baby development at 37 weeks has reached an impressive stage your baby now looks very close to how they’ll appear at birth.
- Size: Your baby is about the size of a small watermelon, averaging 48 cm in length and 2.8 to 3 kg in weight.
- Lungs: Largely developed and increasingly ready to breathe air independently, though fine-tuning continues.
- Brain: Roughly two-thirds developed a significant amount of brain growth still happens after 37 weeks, right through infancy.
- Fat layers: Building up steadily, helping your baby regulate body temperature after birth.
- Grip and reflexes: Strong enough now to grasp fingers, toes, or the umbilical cord.
- Facial movements: Your baby can smile, frown, blink, and turn their head — real, expressive facial movement.
- Practice breathing: Your baby “breathes” amniotic fluid in and out, which strengthens the lungs for their first real breath.
- Thumb sucking: Common at this stage, and a good sign of developing reflexes.
- Weight gain: Around 200 to 250 grams per week from here until birth, mostly fat.
Because there’s very little room left in the uterus, movements at this stage often feel like sharp jabs or slow rolls rather than the bigger kicks you may have felt weeks earlier this is completely normal and simply reflects less space, not less activity.
Your baby is also receiving important last-minute immune support this week. Antibodies pass from your bloodstream through the placenta, giving your baby a temporary boost of protection that lasts for the first few months after birth, until their own immune system matures. This is one of several reasons doctors are cautious about early induction without a clear medical need every extra day in the womb adds real developmental value, even this close to delivery.
37 Weeks Pregnant Symptoms
37 weeks pregnant symptoms can feel like a lot all at once. Here’s what’s common and why it happens:
- Pelvic pressure from your baby’s head-down position and continued descent into the pelvis.
- Shortness of breath easing up as the baby drops lower, pressure on your lungs often reduces, making breathing more comfortable.
- Braxton Hicks contractions irregular “practice” tightening that helps prepare your body for labour.
- Leg cramps staying hydrated and eating magnesium- and calcium-rich foods can help.
- Swelling (oedema) in the feet and hands, caused by fluid retention.
- Breast tenderness and colostrum leakage your body is producing early milk in preparation for feeding.
- Backache, from the added weight and shifting posture.
- Insomnia and fatigue, often linked to discomfort and pre-labour hormonal changes.
- Digestive changes, including bloating, constipation, or occasional nausea.
- Varicose veins a pillow between your legs while resting can improve circulation.
- Frequent urination, as your baby’s position adds pressure to your bladder.
Changes in Your Body at 37 Weeks
- Your baby moving into a downward pelvic position (called “lightening”) often brings relief from heartburn and breathlessness, since there’s less pressure pushing up on your stomach and lungs.
- Not every baby has turned head-down by this point some do so during labour itself, which is also normal.
- Your uterus is now fully expanded, and your skin around the belly may feel tight, sensitive, or itchy.
- Hormonal changes at this stage can also cause extra hair growth and softer or harder nails than usual.
- Expect continued weight gain total pregnancy weight gain by this point is typically around 11.3 to 15.9 kg, though this varies by individual and should be tracked with your doctor.
Signs Labour Is Near at 37 Weeks
It’s completely normal to be watching closely for signs at this stage. Here’s what real labour signs at 37 weeks tend to look like:
- Cramping similar to period pain, as the cervix softens and thins.
- Pelvic pressure as the baby drops further into the lower pelvis.
- Lightning crotch a sudden, sharp pain as the baby shifts into position for birth.
- Loss of the mucus plug the thick mucus that has sealed your cervix throughout pregnancy.
- Diarrhoea, as your digestive system clears out ahead of labour.
- Nesting instinct a sudden urge to clean, organize, or prepare.
- Unusual fatigue, as your body conserves energy for the work ahead.
- Lower back pain, common as labour approaches.
None of these guarantee labour is imminent some women experience several of these signs for days or even weeks before labour actually starts, while others go into labour with very little warning.
It’s also worth knowing that first-time mothers often experience a longer runway between early signs and actual delivery than mothers who have given birth before, since the body hasn’t been through the process yet. If this isn’t your first pregnancy, labour can sometimes progress faster once it begins, so it’s worth having your hospital bag and birth plan ready well before your due date rather than waiting for a clear signal.
When to Call Your Doctor Immediately
Most symptoms at 37 weeks are a normal part of this final stretch, but you should contact your doctor right away if you notice:
- A significant decrease in your baby’s movement, or no movement at all
- Contractions occurring every 5 minutes or less, continuing for more than an hour
- Severe headache, upper abdominal pain, sudden swelling, or blurred vision
- Any vaginal bleeding
- Sudden shortness of breath or chest pain
- A noticeable increase in pelvic pressure
- Your water breaking, with or without contractions
Don’t wait to see if symptoms pass on their own at this stage of pregnancy, it’s always better to call and be reassured than to stay home with something that needs attention.
Tests You May Have This Week
Depending on your doctor’s protocol, expect a check-up roughly every week from now until delivery. Common tests during this window include:
- Urine test checks for glucose (a marker for gestational diabetes), protein (a marker for pregnancy-induced high blood pressure), and signs of infection.
- Blood test checks haemoglobin and red blood cell levels to rule out anaemia.
- Electronic foetal heart rate monitoring tracks your baby’s heartbeat to confirm wellbeing.
- Group B Streptococcus (GBS) screening checks for a common bacterial infection that can affect newborns if untreated.
- Ultrasound confirms your baby’s position and estimated growth.
- Contraction stress test (if needed) checks how your baby’s heart rate responds to contractions.
What to Avoid at 37 Weeks Pregnant
- Heavy lifting or strenuous exercise
- Unpasteurised cheese and undercooked eggs, which carry food poisoning risk
- Smoking, alcohol, and recreational drugs
- Excess caffeine
- Any medication not approved by your doctor, including over-the-counter options
- Lying flat on your back for long periods side-sleeping supports better blood flow
- Long-distance travel, which can be physically taxing this close to your due date
- Ignoring warning signs like decreased foetal movement, severe pelvic pain, or vision changes always report these promptly rather than waiting to see if they pass
Taking Care of Yourself at 37 Weeks
- Eat a mix of fruits, whole grains, vegetables, lean protein, and low-fat dairy.
- Continue your prenatal vitamins, especially folic acid and calcium, unless your doctor advises otherwise.
- Rest when you need to elevate your feet if swelling increases.
- Light, doctor-approved movement (like walking) can help maintain energy and mood without overexertion.
- Keep up with your weekly check-ups from 36 weeks pregnant through delivery.
- Always check with your doctor before starting or stopping any medication or supplement.
- If you haven’t already, take some time this week to connect with your care team about your birth plan, hospital preferences, and any last questions early-term is a good time to finalise these details before things move quickly.
Frequently Asked Questions About 37 Weeks Pregnant
Is 37 weeks pregnant considered full term?
No 37 weeks marks the start of “early term,” which runs through 38 weeks. Full term doesn’t begin until 39 weeks, though babies born during early term are generally considered safe and healthy.
What are the early signs of labour at 37 weeks pregnant?
Cramping, pelvic pressure, loss of the mucus plug, diarrhoea, and lower back pain are common early signs that labour may be approaching.
What is the baby’s weight and size at 37 weeks pregnant?
Your baby typically weighs between 2.8 and 3 kg and measures about 48 cm roughly the size of a small watermelon.
Can I take medication without my doctor’s approval at 37 weeks?
No. Even common over-the-counter medications should be cleared with your doctor first, since some can affect your baby this close to delivery.
What should I expect in the coming days at 37 weeks pregnant?
Labour can begin at any time from this point on. Pay close attention to changes in your body, and don’t hesitate to contact your doctor if anything feels different or concerning.
