Due to the current lack of scientific knowledge about fertility for many couples. Often, we encounter many patients who take a detour or even take the wrong path. Is there a basic principle to see fertility? The answer is yes. Mastering the basic principles will not be easy to take a detour or take the wrong path. Simply grasp the 4 steps can reduce the chance of taking the wrong path. 1, whether there is a fertility problem The couple has a regular sex life while there is no contraception, more than 1 year or more the woman is not pregnant, the man is called infertility, the woman is called infertility. Some just married a few months to go to the medical examination, check the sperm a little abnormal to be buckled a infertility, is not quite appropriate. 2. Is it the male partner’s problem? Or is it the woman’s problem? Or is it a problem of both parties? Remember that conception is a mutual matter, so you need to find out whether it is a problem of one person or two. 3. What are the causes of these problems? Now that science is relatively advanced, we can still find the cause of most of the problems, and only when we find the cause can we treat them effectively. 4.What are the solutions to these problems? There may be several solutions to these problems, and we have to weigh the time, cost, the couple’s willingness to have children, and the disturbance to their lives to choose an appropriate solution for treatment.