If you take clarithromycin in the early stages of pregnancy it can have an effect on the fetus, because clarithromycin is still toxic to the fetus. It is advisable to go to the hospital for an ultrasound examination to find out whether the current fetal development is normal. It is also recommended that from the perspective of eugenics, it is best to consider terminating the pregnancy. Because clarithromycin has toxic effects on the embryo as well as on the fetus, it is likely to cause fetal malformations. Clarithromycin can also pass into breast milk through metabolites, so women who are pregnant or breastfeeding should not be treated with clarithromycin. If you are suffering from a disease during pregnancy, you should only use the drug under the guidance of a doctor and not take the drug blindly, which may lead to fetal malformation, and clinically affect eugenics and require termination of pregnancy.