If you take diet pills without knowing that you are pregnant, it is advisable to read the instructions of the diet pill in detail. If it is written on the instructions that it is contraindicated in pregnant women, it is possible that this drug may cause fetal deformity or cause the possibility of miscarriage, so it is advisable to terminate the pregnancy. If it is written on the drug that pregnant women should be cautious, there is a possibility that this drug may have an effect on the fetus, but the effect is not certain in the clinic, so it is recommended that it is best to take the drug to the eugenics department of the hospital to do further counseling to find out whether or not this drug will cause malformations on the fetus, and then decide whether to continue the pregnancy or terminate it. However, it is advisable for women to plan their pregnancies, and only if they plan their pregnancies and make adequate preparations psychologically and in their daily lives will they not take a certain medication that will affect the development of the fetus after they become pregnant.