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Week 1


Pregnancy week by week


An egg is the size of peach fuzz

What happens when you are 1 week pregnant?

Your Baby

To have the best chance of having a healthy pregnancy and a healthy baby, before conception both parents should be eating a well-balanced diet, and taking regular exercise. Doctors also recommend that you both give up smoking and taking illegal drugs including cannabis, cut out alcohol and cut back on caffeine. Before getting pregnant, women should also speak to their GP about any regular medication they are taking. This includes contraceptive implants and intrauterine devices (IUDs), which will need to be removed.

Mum and Dad

When you're pregnant, doctors calculate your due date from the first day of your last period. So in pregnancy week 1, you'll be having your period. Remember that your due date is worked out from your last 'natural' period ( withdrawal bleeds after you've stopped taking the contraceptive pill don't count). Ideally you should try to have one natural period before you start trying for a baby, so that the dates can be worked out accurately but it won't harm your baby if you don't.

Stay Healthy

Women should take folic acid supplements when you're trying for a baby and during the first 12 weeks of pregnancy. Would-be Mums and Dads should both make sure they are getting plenty of essential fats (omega 3 and 6), which are contained in oily fish, nuts and seeds. This guide is based on the normal development of an average pregnancy so please don't worry if things don't happen as predicted on this time line - each mother and baby are different. It is important that you discuss your pregnancy with your family doctor and/or midwife regularly. Once your baby is born your midwife or health visitor or GP will give you advice on their development.

Your Journey

Pregnancy week by week
Pregnancy Week 25
At 25 weeks, your baby is about the size of a cauliflower

week 25

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