The dangers of smoking in the first or second month of pregnancy are that it may lead to fetal malformations, spontaneous abortions, etc. It may increase the risk of pregnancy-related diseases, and it is recommended to quit smoking in time. Some studies have shown that active smoking or excessive exposure to secondhand smoke during pregnancy is likely to have serious effects on the fetus. Maternal smoking during pregnancy increases the likelihood of adverse outcomes such as early placental abruption, fetal malformations, spontaneous abortion, preterm delivery, and fetal growth retardation. Smoking during pregnancy also leads to a higher risk of neonatal disorders such as intracranial hemorrhage in newborns. During pre-pregnancy, pregnancy and breastfeeding, it is recommended to strictly abstain from smoking and limiting alcohol, consume a variety of foods but avoid excessive intake of spicy and stimulating foods, supplement nutrient deficiencies if they exist, maintain a ventilated and comfortable living environment, and exercise moderately. Smoking is prohibited during pregnancy, and women who do smoke should quit in a timely manner.