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Trimester 3 · week 37 of 40

37 weeks pregnant

From 37 weeks, the pregnancy is considered early term. The baby keeps maturing and the most important thing now is to recognize movements and the signs of labor.

Translated from the original Brazilian Portuguese content with the help of artificial intelligence. Read the original in Portuguese

Read about your current week or get ready for what comes next.
Visual size comparison at week 37: a bunch of chard
Visual reference: a bunch of chard. Not an individual clinical measurement.
Quick read

In 1 minute

  • The baby's brain and lungs keep maturing.
  • Movements remain essential.
  • Appointments are usually weekly.
Fetal development

How your baby is doing this week

The circulation and musculoskeletal system are well developed, while the lungs, brain and nervous system keep refining their functions. The baby may already be engaged in the pelvis, but this varies.

3D artistic representation of fetal development at week 37
Artistic 3D representation. This is not an ultrasound and does not represent your baby's individual development.
Body and routine

What may change in your body

There may be more pelvic pressure, vaginal discharge and irregular contractions. True labor tends to show a progressive pattern of contractions, but every story is different.

Possible steps

Care for this week

  1. Follow your maternity hospital's advice on when to go in.

  2. Seek care if you have leaking fluid, bleeding, a significant decrease in movements or other warning signs.

  3. Avoid 'home remedies' to induce labor without guidance.

Prenatal care focus

  • Weekly appointments check blood pressure, maternal well-being, growth, heartbeat and movements, as well as birth planning.
Twin pregnancy

If you're expecting twins

Many twin pregnancies have a planned birth before or around this stage, depending on chorionicity and clinical progress.

Support network

For those by your side

Keep your phone charged, transportation arranged and stay operationally calm. The best plan is simple and known to everyone.

Common questions

Questions for this week

Does losing the mucus plug mean the baby will be born today?

Not necessarily. It can happen hours or days before labor.

Should the baby move less close to birth?

A decrease in movements should not be ignored. The space changes the type of movement, but the pattern is still relevant.

When to seek care

  • Fluid leaking from the vagina, especially in a gush or a continuous trickle, needs to be evaluated.
  • Once movements have become familiar, a significant decrease in the pattern you notice should be evaluated without waiting until the next day.
  • After 20 weeks, a severe/persistent headache, vision changes, severe pain in the upper abdomen or sudden swelling deserve evaluation for a possible hypertensive condition.

In an emergency, go to the urgent care service in your area. This content does not replace a professional assessment.

Next · week 38

The next chapter

In week 38, the baby keeps refining functions and the body may alternate calm days with increasingly clear signs of preparation.

See week 38

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Sources and transparency

Nilu editorial content, written from the official sources above. Individual clinical review of each week is in progress — this text is for information and does not replace your prenatal care.