Girls smoking has an effect on fertility, smoking is not good for health, cigarettes contain a large amount of carcinogens like nicotine and also contain a certain amount of benzopyrene, which is toxic. If you smoke normally during pregnancy, it is possible that the high level of toxins in your body may lead to mutations in the fetus’ genes, thus increasing the incidence of birth deformities. Therefore, for safety reasons, not only should you not smoke during pregnancy, but you should also not be exposed to second-hand smoke, and you should absolutely abstain from smoking from the preparation period, or you should abstain from smoking for at least six months before you start preparing for pregnancy. Pregnant women should abstain from alcohol and eat more fruits and vegetables that are rich in vitamin C in order to produce a better quality fetus.