Stopping smoking will help both you and your baby immediately. Harmful gases, such as carbon monoxide, and other damaging chemicals will clear from your body. When you stop smoking:

  • you will reduce the risk of complications in pregnancy and birth

  • you are more likely to have a healthier pregnancy and a healthier baby

  • you will reduce the risk of stillbirth

  • your baby is less likely to be born too early and have to face the breathing, feeding and health problems that often go with being premature

  • your baby is less likely to be born with a low birth weight. Babies of smokers are, on average, 200g (about 8oz) lighter than other babies, which can cause problems during and after labour. For example, they are more likely to have problems keeping warm and are more likely to get infections

  • you will reduce the risk of sudden infant death syndrome (SIDS), also known as "cot death".

Stopping smoking now will also help your baby later in life. Children whose parents smoke are more likely to suffer from asthma and other serious illnesses that may need hospital treatment.

The sooner you stop smoking, the better. But even if you stop in the last few weeks of your pregnancy this will benefit you and your baby.

Secondhand smoke (previously known as passive smoking) also harms your baby

If your partner or anyone else who lives with you smokes, their smoke can affect you and your baby before and after their birth. You may also find it more difficult to stop if someone around you smokes.

Secondhand smoke can also reduce your baby's birthweight and increase the risk of sudden infant death syndrome (SIDS), also known as "cot death". Babies whose parents smoke are more likely to be admitted to hospital for bronchitis and pneumonia during their first year.