Taking medication in the first month of pregnancy usually has no effect, but some special drugs cannot be taken, such as anti-viral drugs, anti-tumor drugs, quinolones, these drugs have an effect on the fetus after pregnancy, if after using these drugs, it is best to get pregnant only after 3-6 months of using the drug. These drugs are more toxic and slow to metabolize, most of them take 3-6 months to metabolize clean, so if you have fertility requirements, it is best to get pregnant after this drug is metabolized. Before getting pregnant, it is important to determine whether or not you can get pregnant depending on the type of medication you take.