Some drugs do have a certain impact on the fetus, and some harmful substances in some drugs can enter the fetus through the mother\’s body and affect fetal development. For example: aspirin can cause fetal skeletal malformations; protons can cause congenital heart disease in children; tetracycline can cause fetal skeletal malformations and yellowing of deciduous teeth; rhubarb can cause miscarriage; streptomycin and kanamycin can damage fetal hearing and sperm.