WOMEN in Yorkshire are some of the most likely to be smoking while pregnant.
But mothers in Kirklees and Calderdale are among the least likely in the county to still be smoking when their babies are born.
Even so, mums in the Huddersfield area are worse than the national average.
Figures released by the Department of Health show 12.7% of new mothers in England are still smoking when their child is born – a drop of 12% over the past five years.
But the majority of health authorities in Yorkshire are much worse than the average.
Only Calderdale is better than the average at 12.6%.
The worst performing area in the county was Hull where almost one in four (23.1%) women were still smoking at the time of birth – twice as high as the national average.
Wakefield, Barnsley and Doncaster were also all above 20%.
Kirklees mothers were also worse than the national rate with 13.1% smoking at the time of delivery.
But the Huddersfield region matched the nationwide improvement in its figures, notching a 12% decline since 2007/08.
Nicky Hoyle, Consultant in Public Health for Kirklees Council, said: “The reduction in smoking among pregnant women is good news for the health of babies and children in Kirklees.
“Mothers who do not smoke in pregnancy give their babies a better start in life – such as a healthy birth weight and reduced risk of infant mortality.
“Smoke-free households also have health benefits for babies and children.
“However, there is more to be done as one in eight pregnant women continue to smoke and this is much higher in some areas of Kirklees.
“The council, with our partners in the NHS, is working to reduce smoking among women of child bearing age and pregnant women, through advice and support in pregnancy and through stop smoking support.”
The healthiest areas of England are Westminster and Richmond and Twickenham where fewer than 3% of expectant mothers are still smoking at the time of delivery.
For advice on quitting contact your GP, midwife or the Stop Smoking Service, www.locala.org.uk or by calling 01924 351498.