An interesting question. Prior to becoming a lawyer, and then a freelance writer, editor and publisher, I was a therapist who used to help people quit smoking cigarettes, and around 95% of my patients successfully quit smoking cigarettes in only one hourly session. Many of my patients were females too. Firstly, you must have a burning desire to quit smoking cigarettes in the first place. Children and health are great motivators from previous therapy experiences.
People want to quit smoking because they're pregnant, and hence don't want to harm their baby. People also quit smoking because they've been diagnosed with a disease of some sort, and some see the need to quit smoking cigarettes to not smell like an ashtray anymore.
Statistically, the general success rates I learnt in my therapy training are as follows:
Neuro Linguistic Programming and Hypnosis combined - 85-95% success rate
Traditional hypnosis - 40% success rate (the placebo effect)
Gum and patches - slightly below that of traditional hypnosis.
Willpower alone/cold turkey - 14% success rate
Acupuncture is good, and so are those electronic cigarettes, in making believe that you're still smoking a cigarette, even though you aren't.