0–9 months

Slide through pregnancy month by month. Each month shows what's forming in your baby's brain and what you might be feeling. Months are approximate. Week numbers are counted the way your provider counts them, from the first day of your last period.

Illustration of a pregnant woman looking down at her belly, with a glowing brain and a baby with a glowing brain inside
Glowing illustration of a developing baby
1Month

Baby's brain

Your mind and body

Timelines vary from pregnancy to pregnancy. Your provider is the best guide to your own.

Six keys to your baby's brain health

Tap each key to see what helps.

Remember: these are ways to stack the odds, not tests to pass. Preterm birth, infections, and stress often happen for reasons no one controls, and support after birth helps babies' brains keep growing.

You don't have to wait until it's bad

These free US lines are for parents, partners, and anyone supporting them, during pregnancy and after.

Outside the US, contact your local emergency number or health service. If someone has confusion, hallucinations, or thoughts of harming themselves or the baby, call 911 or go to an emergency room.

Physical warning signs like chest pain, trouble breathing, a severe headache, or heavy bleeding during pregnancy or in the year after birth also need care right away. See urgent warning signs

Safety information in other languages: Español · Français · 中文 · Tiếng Việt · Italiano