Pregnancy Guide

Pregnancy Week by Week

There's a lot to consider when you are pregnant, including healthy eating in pregnancy, antenatal care, decisions you need to make about labour and birth, coping with common pregnancy problems, and when pregnancy goes wrong.

You can find out about all these, and also read about your baby's development in our week by week pregnancy content, by clicking on the links below.

Find out what's happening to you and your baby at:

0-8 weeks pregnant

Three weeks after the first day of your last menstrual period, your fertilised egg moves slowly along the fallopian tube towards the womb. Find out what happens next. You might start to notice the first signs and symptoms of pregnancy.

9, 10, 11, 12 weeks pregnant

By now the face is slowly forming, and the eyes are more obvious and have some colour in them. You might still be feeling tired and sick, but this should clear up soon. Find out what else happens in the third month of pregnancy.

13, 14, 15, 16 weeks pregnant

At 14 weeks, the baby is about 85mm long from head to bottom. If you have been feeling sick and tired, you will probably start to feel better when you are around 13 or 14 weeks pregnant.

17, 18, 19, 20 weeks pregnant

Your baby's body grows bigger so that the head and body are more in proportion.

21, 22, 23, 24 weeks pregnant

When you are 24 weeks pregnant, the baby has a chance of survival if he or she is born. Most babies born before this time cannot live because their lungs and other vital organs are not developed enough.

25, 26, 27, 28 weeks pregnant

Your baby may begin to follow a pattern for waking and sleeping. Very often this is a different pattern from yours, so when you go to bed at night, the baby may wake up and start kicking.

29, 30, 31, 32 weeks pregnant

By about 32 weeks the baby is usually lying with its head pointing downwards, ready for birth.

33, 34, 35, 36 weeks pregnant

Your baby's bones are starting to harden now, even though the skull bones will stay soft and separated to make the journey through the birth canal easier.

37, 38, 39, 40 weeks pregnant

The amniotic fluid now turns into waste, called meconium, in the baby’s intestines, and the soft hair (lanugo) that covered your baby’s body is now almost all gone.

Over 40 weeks pregnant

Find out what to expect if you go overdue.

Last Updated: 13/12/2017 12:31:26
The information on this page has been adapted by NHS Wales from original content supplied by NHS UK NHS website