Can quitting smoking cold turkey hurt me or my baby? I'm pregnant. How much extra weight will I gain if I quit smoking during pregnancy? I'm pregnant. My doctor told me to NOT quit cold turkey! Your body is used to this nicotine and it can cause you to have withdrawls and all sorts of things. Q&A: Is it safe to quit smoking cold turkey when pregnant? Wondering if you or your baby will be affected if you quit smoking while pregnant? Feb 4. Cold Turkey: If you are pregnant, the best bet might be to quit cold turkey, but it can be really tough, and resisting the urge to smoke will be. I heard that if you quit cold turkey you can put the baby into shock.