Implementation support toolkit

Smoking

Why this is important

Stopping smoking in pregnancy is important for the health of the woman or pregnant person and their baby. Identifying women and pregnant people, and their partners, who smoke at routine antenatal appointments enables those who have not engaged with specialist support, or who have relapsed, to be identified and (re-)referred for stop-smoking support and treatment.

Recommendation 1.18 in NICE's guideline on tobacco: preventing uptake, promoting quitting and treating dependence recommends providing routine carbon monoxide testing at the first antenatal appointment and at the 36-week appointment to assess maternal exposure to tobacco smoke during pregnancy.

Nationally, the proportion of booking appointments that included a record of a carbon monoxide (CO) test in 2023/24 was just over 50%. Of the 36-week appointments recorded in MSDS in 2023/24, 57% had a recorded CO test.

Figure 5: Percentage of booking appointments with a record of a carbon monoxide test, England, 2019 to 2024.

Insight provided to NICE from the healthcare system indicates that some of the reasons for the variation recorded, may be:

  • The test was carried out, but not recorded

  • There may not be enough CO monitors available for use in the clinic, or there are no disposable mouthpieces to use with the monitor

  • The kit may be damaged, not available for use at the time of the appointment, or not sufficiently charged to take a reading (if battery powered)

  • Newer staff may not be trained, or feel comfortable, in using the kits, or in having the conversation about CO testing and smoking

  • Lack of time in the appointment.

Supporting uptake and adoption of NICE guidance

Support from NICE

  • NICE has produced a guideline on tobacco: preventing uptake, promoting quitting and treating dependence, which makes recommendations on treating tobacco dependence in pregnant women. These can be used alongside the recommendations in our antenatal care guidelines.

  • There is a pregnant or breastfeeding scenario within the smoking cessation clinical knowledge summary (CKS) on the NICE website. It covers:

    • How to manage pregnant or breastfeeding woman who want to stop smoking

    • What practical advice to give pregnant or breastfeeding women to help them stop smoking

    • Which sources of information and support should be given to pregnant or breastfeeding women who wish to stop smoking to

    • What drug treatment should be prescribed for a woman who is pregnant or breastfeeding to help her stop smoking

    • How to follow up pregnant or breastfeeding women who want to stop smoking.

Support from our partners

Please see the separate section on addressing ethnic health inequalities for further advice in relation to this topic.

Note that external websites and resources have not been produced by NICE. NICE has not made any judgement about the methodology, quality or usability of the websites or resources.

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