Because the appearance of biological brothers is often similar, the children born from the sperm of the biological brothers will also look similar to the patients and will not easily arouse suspicion, so we often encounter many patients to ask such questions. In fact, the law on assisted reproductive technology clearly stipulates that the source of sperm for donor sperm can only come from sperm banks. The reason for this rule is for the benefit of the patient’s couple and their offspring. Imagine how the child born from the patient’s brother’s sperm will address the patient’s brother; whether the child will compete for property with the brother’s own child; how the relationship between the brother and the patient’s wife will be handled, etc. There will be a whole host of possible problems. These problems do not exist with the use of sperm from a sperm bank. The sperm exchange between the sperm bank and the fertility center is identified by a code that avoids information leakage between the sperm donor and the recipient donor, protecting the privacy of both parties. The sperm donor has no rights or obligations to the child born through the sperm donor and has no way to find information about the couple receiving the donation.