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The Pregnancy Hub

30 weeks pregnant

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

Choose your week

Week 30

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 cabbage

Third trimester

About the size of

a cabbage

Approximate length

15.7 in / 39.9 cm Head to heel

Your baby

Your baby's eyes can focus, although vision continues developing after birth. Looking, hearing and other sensory abilities develop over time rather than becoming fully mature at a single week. The cabbage comparison gives a rough sense of size. It does not tell you when labor will start or how your baby will respond to birth.

Your body

Vivid dreams, interrupted sleep and worries about delivery may make nights feel long. Tell your care team if you are persistently anxious or unable to rest. Preparing can help some people feel more confident, but you do not need to learn every possible complication. Choose the questions that would most help you understand what happens next.

This week

Learning about labor

Labor is commonly described in stages: the cervix opens, the baby is born, and then the placenta is delivered. The pace and support needed vary. Ask your team how they explain progress, what comfort and pain-relief options are available, and how you can participate in decisions. A birth-preparation class or a focused conversation may help you and your support person. Also ask which symptoms require a call before term; a general description of labor should never be used to dismiss contractions, fluid leakage or other concerns that start early.

Explore birth preparation

Looking ahead

A question for your next visit

Can you explain labor stages and the comfort options available at my planned birth setting?

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.