The medical definition of infertility is a couple of childbearing age who are sexually active, living together without contraception, and have not conceived within 1 year. Couples around 25 years of age who have regular sex have about a 1/4 chance of getting pregnant each month, and within a year about 90% of couples who want to have a child will conceive. Among the causes of infertility, male factor accounts for about 40%, female factor accounts for about 40%, unexplained infertility accounts for about 10%, and both men and women have problems account for about 10%. Among female infertility, tubal factors account for about 40%, ovulation factors account for about 40%, unknown causes account for about 10%, and the other 10% are uncommon factors, including uterine factors, cervical factors, immune factors, etc. Conception is a relatively complex process, to complete the process, the couple must have certain fertility conditions, these fertility conditions can be broadly divided into the following aspects: 1, the testicles of men can produce normal sperm. Normal adult men ejaculate a semen volume of 2-6 ml, the number of sperm in each ml of semen should be more than 20 million, with the ability to move sperm up to 60% or more. If the sperm does not reach these standards, it is not easy to make the woman conceive. 2. A woman’s ovaries can discharge healthy and mature eggs. A woman with normal menstruation has a healthy and mature egg in every menstrual cycle so that she can have a chance to get pregnant. For women with ovarian insufficiency or abnormal menstruation, it is not easy to conceive. 3. It is important to have a normal sex life before and after ovulation so that the sperm and egg have a chance to meet and fertilize. The sperm can survive in the vagina for 1-3 days and the egg can survive for about 1 day after discharge. The chances of conception during non-ovulatory intercourse are low. 4. The reproductive tract must be unobstructed. The male vas deferens must be open so that the sperm can be discharged through normal sexual intercourse and enter the female reproductive tract to unite with the egg. The female reproductive tract must also be open so that the sperm entering the vagina during sexual intercourse can pass through the cervix, uterus and reach the fallopian tubes to meet the egg for fertilization. The fertilized egg can also enter the uterine cavity smoothly. If the fallopian tube is blocked, the sperm and the egg will lose the opportunity to combine, so once the fallopian tube is blocked, the chance of natural conception is completely lost. 5. The environment in the uterus must be suitable for the fertilized egg to be laid and develop. After fertilization in the abdomen of the fallopian tube, the egg develops while moving towards the uterus via the fallopian tube, arriving at the uterine cavity 3-4 days later and buried in the nutrient-rich endometrium for 6-8 days, then continuing to develop into a fetus. If the fertilized egg enters the uterine cavity earlier or later, the endometrium will be unsuitable for the fertilized egg to be laid and continue to develop, and it will be impossible to get pregnant. 6, the normal physiological situation of couples living together without contraceptive measures, the chance of conception every month is 20%, half a year the chance of pregnancy is 70%, a year the chance of pregnancy is 80%, if more than a year without contraceptive measures and infertility should be medical examination, that is, a couple what fertility problems are not any month want to get pregnant can be as desired to taste Shang.