One kidney is capable of having children. Although the human body grows two kidneys, research has found that one kidney is able to completely replace the function of two kidneys. A very typical example of this is that patients with uremia are able to achieve long-term survival after kidney transplantation. A patient with uremia is a transplant of one kidney of another person, and this one kidney is able to adequately detoxify and drain to meet the physiological needs of the organism. Therefore, it is possible for a person with one kidney to have a child. However, it is necessary to emphasize that pre-pregnancy tests before pregnancy are necessary, especially urine routine and kidney function, in order to exclude underlying kidney diseases. Because pregnancy is a heavy burden on the kidneys and may cause deterioration of kidney function, which may even lead to acute renal failure, urine routine, kidney function, blood pressure, etc. should be closely monitored during pregnancy. Once abnormalities in urine tests and worsening kidney function are detected during pregnancy, they must be actively treated and, if necessary, the pregnancy should be terminated.