The current IVF technology is improving, and in terms of technical principles, into doing IVF can determine the male and female. However, both legally and morally and ethically, medical practitioners are not allowed to help couples, privately, to artificially choose the gender in the IVF process. The sex of the child cannot be decided unless the couple has inherited genes that will cause the next generation to have a genetic disease. In IVF, the sex of the embryo can be confirmed and determined by a special method of biopsy of 1-2 cells for analysis of the embryo at the 4-10 cell stage after in vitro fertilization, but it is only applied to embryos with high suspicion of genetic disorders to prevent the discovery of fetal abnormalities or the birth of a child with severe malformations after conception. This technique is limited to couples with genetic disorders, and its screening procedure is complex and costly, making it completely unnecessary if the test is performed solely for the purpose of having a boy or girl. In addition, hospitals cannot test the sex of a fetus if there is no medical need to do so. Parents should follow the concept of “a boy or a girl is as good as a girl” and should not abandon their child just because they don’t like the gender, but should be at peace with the birth of a new life.