Tetracycline after stopping the drug is best to be 3 months before considering pregnancy, the main reasons are as follows: 1, oral tetracycline will be metabolized relatively quickly, in the body of the time will be relatively short, 3 months is enough time to discharge the body of the drug, the pregnancy will not have an impact. 2, in the discontinuation of the drug if you plan to get pregnant, you need to take folic acid tablets orally, because it has been learned that once a woman lacks folic acid in the body, the pregnancy may lead to fetal malformations, resulting in an increase in the proportion of births of anencephaly or spina bifida. The reason is that it has been known that once a woman lacks folic acid in her body, pregnancy may lead to malformations in the fetus, increasing the proportion of children born with anencephaly or spina bifida. Therefore, it is necessary to give oral folic acid tablets and start taking them 3 months before planning to get pregnant, which is sufficient to achieve the purpose of prevention, so consider getting pregnant 3 months after stopping the medicine.