The U.S. FDA has been based on the teratogenic effect of drugs on the embryo and fetus, the harm level of the drug is divided into A, B, C, D, X5 levels. class A is no teratogenic drugs, such as the right amount of vitamins; class B can be used under the observation of a physician, such as penicillin, erythromycin, digoxin, insulin, etc.; C, D, X level refers to the fetus may have an adverse effect or teratogenic effect, the use of pregnant women is strictly prohibited. The anti-inflammatory drugs we come into contact with in our daily life are mostly cephalosporins, penicillins or erythromycin, which basically belong to class B drugs, and short-term, low-frequency use is generally not obviously harmful to the embryo or fetus in the abdomen. Pregnant women taking anti-inflammatory drugs at the beginning of pregnancy, different time, the impact of taking drugs is also different. Within 4 weeks of pregnancy, external factors such as drugs, radiation, physical, chemical factors, etc. on the embryo’s impact on the performance of the “all or nothing” effect, such as the above factors have an impact on its embryo will appear in the embryonic sterilizations, miscarriages; if there is no impact on the survival of the fetus and will not appear to be deformed, such as the use of medication in more than 4 weeks of pregnancy, we need to find out the type of drugs and the amount of drugs, analyze the impact on the fetus. If the drug is used in more than 4 weeks of pregnancy, it is necessary to find out the type of drug and the dosage to analyze the effect on the fetus. To sum up, taking anti-inflammatory drugs in early pregnancy, you can go to the hospital to consult the obstetrician, and carry out the necessary checks, if the test results show that the fetus is normal, you do not have to worry too much. However, you should be careful when taking medication during pregnancy and consult your obstetrician before taking any medication.