pregnancy-week-by-week

1 week pregnant

What to expect this week

What's happening this week

1-week-pregnant

It is highly unlikely you even know you are pregnant right now – but there are a whole lot of things already going on with you and your unborn baby.

At a glance

  • The sex of your baby has already been decided at this early stage
  • They are growing faster now than at any other point in your pregnancy
  • Your baby's brain, heart and spine are already forming

Your baby at week one

Your son or daughter – because yes, their sex is already decided this early! – is growing faster now than at any other point in your pregnancy, and their brain, heart and spine are already forming. It's doubtful you are feeling any signs of their presence this early though.

You at week one

If you have been trying to conceive, you've hopefully been taking folic acid supplements already, but if you haven't, now's the time to start – check out our nutrition and supplements page to find out why this is so important for your developing baby.

And guess what – because of how pregnancy is calculated, at this stage, just a week into your pregnancy, you are actually already considered to be one month pregnant!

What to think about 

Even though you probably have no idea you have a baby on board right now, if you have been trying to conceive, you are no doubt already making lots of plans for when you do have your little one, and eagerly awaiting that positive result on your pregnancy test! Obviously your health – and that of your unborn baby – is paramount throughout pregnancy, and never more so than in these very early days of conception and development. Check out our pages on diet and health in pregnancy for lots of top tips on staying fit and active no matter what stage of pregnancy you are at.

At a glance

  • The sex of your baby has already been decided at this early stage
  • They are growing faster now than at any other point in your pregnancy
  • Your baby's brain, heart and spine are already forming
Folic acid is important for your developing baby. If you haven't started taking it yet, now is the time to start

What to expect next