Pregnant women who smoke after pregnancy cannot take steps to remedy the situation, but can only avoid further harm by stopping smoking. If you find out you are pregnant and already smoke, the main remedy is to quit smoking immediately, stay away from smoking places, avoid secondhand smoke, and go to the hospital for a comprehensive checkup to observe the development of the fetus. If the pregnancy can be continued, take folic acid for the first 3 months of pregnancy as prescribed by your doctor to prevent fetal developmental malformations. Pay attention to 20-24 weeks ultrasound to check for fetal structural malformations. Take care to rest and be active during the day. Take a balanced diet with vitamin-rich fruits and vegetables, less spicy and stimulating food and avoid alcohol. If the fetus is already abnormal, it is recommended to terminate the pregnancy according to medical advice. Smoking during pregnancy can affect fetal growth and development, causing fetal growth restriction and even fetal malformations, such as fetal neural tube malformation, clubfoot and cleft lip and palate. Smoking also forms carbon monoxide, which affects the binding of red blood cells to oxygen, leading to fetal hypoxia. In addition, smoking can cause damage to a pregnant woman’s own immune function, making her vulnerable to gestational hypertension syndrome and increasing the risk of preterm delivery. Therefore, it is important to quit smoking as early as possible during pregnancy preparation and stay away from smoking environments.