Promoting smoking cessation during pregnancy: a combined feasibility and pilot trial of a theory-based intervention using narrative, images and embedded behaviour change techniques, delivered via text-messaging.

We have developed an intervention that aims to help pregnant women to stop smoking by sending text messages with embedded behaviour change techniques. We need to do a large scale trial to find out if the intervention works in helping them to quit, but a feasibility/pilot study is required first to test out the trial methods.