The waiting month
The final stretch is largely about fine-tuning what's already built. Lungs finish maturing and are typically ready for that first breath by around week 37, which is why a full-term due date has a range rather than a single fixed day. Fat continues building under the skin, smoothing things out, while the baby drops lower into the pelvis in preparation for labor.
Baby this month: about 50 cm — crown to heel, close to the length of a small watermelon · 3–3.5 kg
≈ 50 cm — about the size of a small watermelon
Illustration enlarged for clarity — the amber marker shows true relative size · head-down, ready position
What's developing right now
Finish maturing around week 37, generally ready to support breathing outside the womb from full term onward.
Continues rapid growth that will keep going well after birth.
Rounds out the baby's appearance and helps regulate temperature after delivery.
Fully formed and ready to begin processing milk shortly after birth.
What your body is doing
- The baby typically drops lower into the pelvis, a shift sometimes called 'lightening.'
- Contractions may become more frequent as the body prepares for labor.
- Pelvic pressure and frequent urination often increase again.
- Nesting energy or, alternatively, exhaustion can both be common in these final weeks.
Eating for this month
Nutrient needs stay similar to month eight, with a continued focus on steady energy, iron, and calcium as the body prepares for labor and, later, feeding. Staying hydrated and eating light, frequent meals can help when there's little room left in the abdomen. This is a good month to keep meals simple and manageable rather than ambitious.
Checkups commonly done this month
- Weekly prenatal visits to check the baby's position, heart rate, and the parent's blood pressure — schedules vary by country and doctor
- A group B strep swab around weeks 36–37, in places where routine testing is offered — ask your doctor or midwife
- A cervical check in the final weeks, if relevant to the birth plan
- Non-stress tests or growth scans if the pregnancy goes past the due date
Warning signs and what to do
Your baby moving less than usual, or a change in the usual pattern: contact your maternity unit now, even at night, and do not wait until the next day
Vaginal bleeding, or fluid from the vagina that is green, brown, bloody or smelly: contact your maternity unit now and go to hospital
A a severe headache, vision changes, pain just below the ribs, or sudden swelling of the face, hands or feet, which can signal preeclampsia: contact your maternity unit now
Your waters breaking with clear fluid, or regular contractions every 5 minutes or more often: call your maternity unit now for advice; if the baby is coming now or you have a strong urge to push, call emergency services now
Questions people ask
What if the due date passes without labor starting?
It's common — only a minority of babies arrive exactly on their due date, and many pregnancies continue a week or so beyond it. Doctors typically monitor more closely past the due date and usually discuss inducing labour from around 41 weeks. Keep paying attention to your baby's movements: if they slow down or change, contact your maternity unit now.
How will I know labor has actually started?
True labor contractions become regular, get closer together over time, and grow stronger despite rest or position changes, unlike the irregular Braxton Hicks tightenings from earlier months. Other signs can include the waters breaking or a bloody show. A doctor or midwife can help clarify what's being felt if it's unclear.
Sizes and milestones are typical ranges — every pregnancy runs on its own clock. Educational content; your prenatal care team's guidance always comes first.