If you have an unwanted pregnancy while smoking and drinking, you need to undergo a detailed prenatal checkup, and if you find that the fetus has abnormalities and signs of pre-miscarriage, then abortion is recommended. At the same time, pregnant women should quit smoking and drinking in time, so as to avoid the stimulation of tobacco and alcohol affecting the growth and development of the fetus. Whether tobacco and alcohol stimulation will have a serious impact on the fetus is mainly related to the following factors: if it is a small amount of occasional smoking and drinking, it will seldom have an adverse effect on the fetus; if a man smokes and drinks for a long period of time, it may affect the quality of sperm to a certain extent, which in turn will have a certain impact on the fetus; if a woman has a long-term habit of smoking and drinking, it will easily affect the shape of the fetus and the development of the brain to a certain extent, or lead to the emergence of congenital diseases. congenital diseases. Therefore, if an unwanted pregnancy has been detected, timely prenatal checkups should be conducted to determine the extent of harm to the fetus caused by smoking and drinking. If the fetus (embryo) does not show any abnormality and the pregnant woman does not have any signs of pre-eclampsia, she can give birth to a child normally. If the fetus (embryo) is not abnormal and the pregnant woman has no signs of pre-miscarriage, she can have a normal birth. In addition, if the pregnancy is a normal birth, the pregnant woman needs to take positive protective measures to quit smoking and drinking to avoid affecting the development of the fetus and miscarriage, and the rest of the family members should try to quit smoking, so as to keep away from second-hand smoke during pregnancy, and to create a good environment for the growth and development of the fetus. Healthy ways of preparing for childbirth can be carried out according to the doctor’s advice, maintaining a rich and balanced nutritional intake, appropriate exercise, and regular obstetric checkups to observe the growth and development of the fetus in a timely manner.