Preparing for pregnancy without quitting smoking will not only affect your own health, but even if you get pregnant, it will affect the quality of the embryo, the development of the fetus, leading to fetal deformities and so on. Smoking affects the human respiratory system, leading to a variety of lung diseases. Smoking also affects the quality of sperm, leading to fewer sperm and more malformations. Smoking during pregnancy can also lead to male infertility, and even if pregnancy occurs, miscarriage can easily occur due to low sperm quality. Smoking during pregnancy also affects the growth and development of the fetus, and fetal malformations may occur. Therefore, if you want to get pregnant, it is best for both men and women to quit smoking for 3-6 months and prepare for pregnancy under the guidance of a doctor to ensure the health of both mother and baby.