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The Pregnancy Hub

17 weeks pregnant

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

Choose your week

Week 17

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 pomegranate

Second trimester

About the size of

a pomegranate

Approximate length

4.7 in / 12 cm Head to bottom

Your baby

Your baby can open and close their mouth, and fingernails and individual fingerprints are developing. The eyes can move behind closed eyelids. These small changes happen alongside continuing growth of the whole body. A fruit illustration makes the size easier to imagine, but does not measure the health or development of your individual baby.

Your body

A changing body, upcoming tests and thoughts about becoming a parent may bring new emotions. You can feel pleased about a pregnancy and still feel anxious, uncertain or low. Those feelings deserve attention if they persist, affect sleep or make daily life difficult. You do not have to compare your experience with someone else's before asking for support.

This week

Finding support for pregnancy worries

Choose one concern you would like help with and bring it to your next conversation with your care team. It may be uncertainty about a test, a previous pregnancy experience, relationships or practical pressures. Ask what mental-health or community support is available and whether you can speak privately if needed. If you already have a therapist or prescriber, discuss how care will be coordinated during pregnancy and after birth. Thoughts of harming yourself or your baby need immediate help, not a place on a future appointment list.

Explore prenatal care

Looking ahead

A question for your next visit

What support can we arrange for the worries that are affecting my everyday life?

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

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.