Not taking any contraceptive measures and having normal sex but not getting pregnant should be taken seriously, it may be due to the following reasons: 1. The quality of the male partner’s semen has problems, so it can lead to infertility, such as oligospermia or too long anisotropy may lead to infertility, etc. 2. Women may have ovulatory dysfunction, blocked fallopian tubes, inflammation and immune infertility, etc., all of which may lead to no Contraceptive cases do not result in pregnancy. The cause of infertility can be found only after corresponding examination, such as ovulation monitoring, routine semen examination of the male partner, blood sampling for immune infertility and normal endocrine, etc. According to the examination results, the cause of infertility will be analyzed and targeted medication will be used.