Week-by-week guide to pregnancy
When you’re pregnant, you have lots of questions. Our week-by-week pregnancy guide is packed with lots of useful information.
Find out what’s happening inside your body, how your baby is developing and what you can do to have a healthy pregnancy. You can also find out what vaccinations you’ll need and when to get them.
Weeks 4 to 12
Welcome to your 1st trimester! From early pregnancy symptoms to how your baby is growing and developing, you'll find it all here.
Weeks 13 to 27
You are now in your 2nd trimester – a third of the way through your pregnancy – and you're hopefully past the worst of your symptoms.
Weeks 28 to 41
With around 12 weeks to go, you're in your final trimester and your baby is now about the size of a pineapple.
Vaccinations during pregnancy
Some vaccinations are recommended during pregnancy to help protect you and your baby.
These are:
- flu vaccine, available in autumn or winter at any stage of pregnancy
- whooping cough vaccine, usually offered around week 20 of pregnancy
- RSV (Respiratory syncytial virus) vaccine, usually offered around week 28 of pregnancy
Your midwife or GP can tell you where to get them.
Find out more about vaccinations during pregnancy on NHS.UK
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