The effects of smoking during pregnancy are undeniable. Smoking in pregnancy leads, often, to smaller babies, which is not a good thing. I've had clients talk to me in the past about it being a desirable thing, but when I explain the reason why, they soon change their minds, as I explain that this is due to a chronic lack of oxygen reaching the baby and it not being able to grow properly. It also leads to early babies—babies who are born prematurely—again, because the placenta simply can't cope with the inability to give sufficient oxygen levels to the developing fetus. After birth, those babies have a higher level of sudden unexpected death in infancy. Eliminating these consequences is, I would imagine, something we could all get behind.