The prevalence of infertility accounts for about 10% of married couples. However, in clinical work, it is found that due to the lack of knowledge about reproduction and the irregularity of consultation, many couples miss the optimal age of fertility and lose the function of conception, which is a great pity. First, understand the knowledge about reproduction. Simply put, it is a matter of seed and soil. This seed is the male partner’s sperm and the female partner’s egg, and the soil is the female partner’s uterus. However, for human beings, there is also a need for an open magpie bridge for the sperm and egg to meet, and this magpie bridge is the fallopian tube. In other words, in order to get pregnant, the male partner must have enough normal sperm, the female partner must ovulate, have open fallopian tubes, and have a normal uterus. Once you know about reproduction, you will be able to target your examination and treatment. I have outlined the process in five steps. The first step is to check the male partner’s semen. Pregnancy is a matter for both spouses and cannot be blamed on the woman. The male partner’s test is simple and non-invasive, requiring only 3-5 days of abstinence followed by semen retrieval for testing. The second step is to check if the female partner is ovulating. This can be done by taking basal body temperature, ovulation test strips or ultrasound to monitor ovulation. This is also a non-invasive method and is placed in front of invasive tests. The most accurate method is to detect ovulation under ultrasound. The third step is to check whether the woman’s fallopian tubes are open. Tubal infertility is 50% of small female infertility and if there is ovulation but no pregnancy, the fallopian tubes need to be checked. The methods are tubal lavage, hysterosalpingography, hysteroscopic tubal cannulation and so on, all of which are checked 3-5 days after menstruation. The most common method is hysterosalpingography (HSG) The fourth step is to check the condition of the woman’s uterus. There is ultrasound to check the uterine adnexa and hysteroscopy to find out if there are fibroids, polyps, longitudinal abnormalities, etc. in the uterus. Step 5: If none of the above tests reveal any problem and still cannot conceive, it is idiopathic infertility, commonly immune infertility, followed by endometriosis without symptoms. It is common to have immune infertility, followed by endometriosis without symptoms. It is necessary to do immune tests or laparoscopic exploration. We hope that the above introduction can help our infertility friends to see the doctor wisely and treat them reasonably so that they can have their babies as soon as possible.