Nowadays, more and more people are suffering from infertility, but there are many institutions treating infertility in China, and there are also many fraudulent hospitals, so this article is intended to help more infertility patients. First of all, to understand infertility, it is necessary to know how pregnancy is achieved. Pregnancy is a systemic project that requires a series of conditions to be in place for pregnancy to occur. For the male partner, the requirements are relatively simple, as long as there are enough healthy sperm discharged during sex. A woman’s menstrual cycle and pregnancy are closely related. After the middle of the menstrual cycle, the endometrium becomes ready to receive a fertilized egg under the influence of progesterone and becomes the “secretory phase”. If conception does not occur at this time, the prepared endometrium will shed and be excreted as menstruation. The ovaries in a woman’s body are prepared for fertilization every month, and ovulation occurs in the middle of the menstrual period. After the egg is discharged, it is picked up by the fallopian tube and gradually transported in the direction of the uterus. Only then does it become a child. Problems with any of these processes can interfere with a normal pregnancy and lead to infertility. In clinical practice, the definition of infertility is when a man and a woman fail to conceive after a year of normal intercourse. Under normal circumstances, the probability of this is over 80%. Knowing the process of conception, you can probably understand how to perform the tests related to infertility. In clinical practice, the examination for infertility is a gradual process, from simple to complex, from non-invasive to invasive, step by step, to obtain the most valuable information at the simplest cost, this is the principle. If infertility is diagnosed, the first test to be performed is the male partner’s semen to find out if there are abnormalities in sperm quantity and quality, because this is a non-invasive test, so it should be performed as the first step. The thing to note about the sperm test is that there needs to be no sexual intercourse for 5 days before the semen test, otherwise there will be inaccuracy. If the male partner’s semen is found to be abnormal in quantity or quality, he should go to the male department for further examination to understand the cause of the abnormal semen. If there is no problem with the male partner after the examination, then the examination of the female partner will be performed, which is relatively more complicated and invasive. The first examination for the female partner is relatively simple. As mentioned before, a woman can conceive only when she ovulates each month, and there are several methods to understand ovulation. 1. The simpler method is the basal body temperature monitoring. After ovulation, the corpus luteum of the ovary starts to develop, and under the influence of progesterone, the body temperature measured in the quiet state in the morning will increase; In the middle of the menstrual cycle, the ovulation of the ovaries is affected by the action of luteinizing hormone (LH), and ovulation can be detected by ovulation test paper. The subsequent rupture of the follicle can also be used to determine whether ovulation is occurring. Usually, the first two methods are more economical and are often preferred for ovulation monitoring, while the third method is usually used for follicle monitoring during ovulation promotion because it requires ultrasound monitoring in the hospital, which is more laborious. Ultrasound examination of the uterine appendages is also an important test to understand infertility. It may be a benign cyst in the fallopian tube or ovary, but it is useful as an aid to clinical diagnosis.