Yet more women than ever are now lighting up while pregnant, and the problem in Somerset is among the worst in the country.
Figures released today show that almost 15% of pregnant women smoke - that's the biggest rise for four years.
Charli Afzal used to smoke 20 cigarettes a day, but gave up when she became pregnant after advice from Somerset Stop Smoking Service:
For information on giving up smoking, visit the NHS Smokefree website.
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More rain and wind will move in on Friday before the cold weather takes over for the weekend.
It will be cloudy and mild with some brightness today but rain will move in overnight, becoming heavier tomorrow afternoon.
Tennis star Pat Cash, TV presenter Kevin McCloud and Bristol Mayor George Ferguson have helped plant a community orchard in Bristol.