Smart patients should learn to master some of the scientific knowledge of infertility, use this knowledge to identify real and fake hospitals and real and fake doctors, and take the initiative in the treatment process. Modern medicine has already studied infertility quite thoroughly, experts have discovered several factors that lead to infertility, infertility causes are complex, treatment is relatively difficult, but not incurable, the key is to clarify the cause of the symptomatic treatment. In real life, there are many infertile couples, looking around for medical treatment, searching for medication, laboring and hurting money, but ultimately nothing. So, how should infertility be correctly diagnosed? Infertility diagnosis should first clarify the cause of the disease. 1, fallopian tube factors Clinical data show that: infertility caused by fallopian tube factors accounted for about 46% of clinical infertility, CITIC Xiangya Reproductive and Genetic Hospital Xiao Hongmei and other reports, female infertility factors in the fallopian tube, pelvic inflammation accounted for most of the factors, up to 72.7% of the female factors. Jiang Aifang of the Reproductive Center of the Affiliated Hospital of Weifang Medical College reported that tubal factors accounted for 49.17% of the causes of female primary infertility. The fallopian tubes are responsible for transporting eggs from the ovaries to the uterus, and damage to the tubes can prevent sperm from contacting and combining with eggs. Repeated episodes of pelvic inflammatory disease, endometriosis, scarring after pelvic surgery can cause damage to the fallopian tubes. 2.Ovulation factors The corresponding hormone levels are abnormal, resulting in abnormal ovarian follicular development or the ovaries fail to release mature egg cells or abnormalities in the endometrium. 3.Male factors Azoospermia, oligospermia, hypospermia, necrospermia, dysmorphic spermatozoa, semen non-liquefaction and so on. 4, immune factors The reproductive immune problems of the woman or the man lead to the obstacle of combining eggs or sperms, causing infertility. What tests should be done for infertility? About 50% of infertility patients have blind spots in the examination. Couples where the female partner is under 35 years of age and has not conceived after one year of unprotected, regular sexual intercourse, and where the female partner is older than 35 years of age and has not conceived for six months, should visit a qualified medical institution for infertility-related tests. The doctor needs to clarify through the examination whether it is a problem with the man’s sperm or the woman’s egg, or a combination problem where the egg and the sperm cannot meet, and also to find out whether the fertilized egg can be planted successfully and maintain its growth. 1, semen examination, the husband should be in 3-7 days without sex, with in vitro spermulation method to collect semen into a sterile container, because the condom can affect the results of semen analysis can not use condoms to collect semen. The semen examination can understand the number, liquefaction, morphology and activity of the male sperm, which can help to determine or exclude most of the male causes. 2.Tubal patency test Tubal fluids or uterine tubal iodine oil imaging: usually can be performed on an outpatient basis, which can help to understand the morphology of the uterine cavity, the patency of the fallopian tubes as well as the location of tubal obstruction. 3.Ovulation test: There are many ways to determine whether a woman is ovulating or not, for example, through ultrasound and blood test hormone levels can detect ovulation abnormalities. The most commonly used and highly accurate method is to dynamically monitor the follicle development and rupture time under ultrasound, which usually starts from the 11th day of the menstrual cycle under normal menstrual cycle, and this method is non-invasive and easy to implement.