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The Pregnancy Hub

37 weeks pregnant

Get to know your growing baby and the changes you may be feeling.

Choose your week

Week 37

Know your due date?

Enter the due date from your care team to find your estimated week today. Your date stays in this browser tab.

Illustration of a leek

Third trimester

About the size of

a leek

Approximate length

19.1 in / 48.6 cm Head to heel

Your baby

Your baby makes facial movements, including expressions that can look like smiles or frowns. These movements do not mean the same thing as an emotional expression after birth. Development continues. In US terminology, 37 weeks is early term; full term begins at 39 weeks. Reaching this week does not mean every baby has finished maturing.

Your body

You may feel more pressure, practice contractions or an urge to get things ready. Rest also belongs on the list. The way you feel cannot predict exactly when labor will start. Follow the contact instructions from your maternity team, and seek advice about changes in movement, fluid leakage, bleeding or other concerns.

This week

Preparing support for the first weeks at home

Make a practical support plan for after birth: meals, transportation, household work, help with other children and time for you to rest. Ask how postpartum follow-up will be arranged and whom to contact about recovery or emotional health between visits. Include feeding support and the baby's medical appointments. Talk with someone you trust about signs that you need more help, such as persistent low mood, anxiety or difficulty functioning. Thoughts of harming yourself or your baby require immediate help. Support should include your recovery, not only tasks for the newborn.

Prepare for postpartum care

Looking ahead

A question for your next visit

How will my postpartum care be arranged, and who can help if recovery or mood becomes difficult?

Browse pregnancy weeks

A little context for these comparisons

These are approximate sizes for each week, not measurements of your baby. Babies and produce both come in different sizes, and the illustrations are not shown to scale.

Before week 20, length is measured from head to bottom. From week 20, it includes the legs, from head to heel. That change explains the jump in length between weeks 19 and 20.

When to get help

If your baby’s usual movements slow down, stop, or change, contact your maternity care team right away.

Seek medical care right away for warning signs such as a severe or persistent headache, vision changes, chest pain, trouble breathing, severe belly pain, vaginal bleeding, leaking fluid, or thoughts of harming yourself or your baby. These are examples, not a complete list. If you cannot reach your care team, seek urgent medical care. Call 911 for a medical emergency.

Read the CDC urgent maternal warning signs (opens in a new tab)
About this guide

Approximate measurements and development information draw on the NHS weekly guides. Linked US health resources support care and preparation topics. The topics are suggestions for discussion, not a schedule of required appointments or tests. Your own care plan may differ.

Every pregnancy is different. Your care team can help you understand your baby’s growth and any symptoms you’re experiencing.