The dangers of smoking in early pregnancy are that it can lead to embryonic abortion, spontaneous miscarriage, fetal developmental malformations, growth restriction, etc. It can also increase the occurrence of pregnancy complications, such as gestational hypertension. Tobacco contains nicotine, which affects the quality of fertilized eggs and can lead to inadequate oxygenation of embryonic trophoblast cells and insufficient blood circulation to the fetus, resulting in embryonic abortion and miscarriage, as well as deformities in the growth and development of the embryo’s organs. Smoking is prohibited throughout pregnancy and also during pregnancy preparation, as it not only has a negative impact on the growth and development of the fetus, but also increases the chances of pregnancy complications and complications for the pregnant woman.