Gender selection is possible with the third generation IVF technique. However, our current policy does not allow gender selection without medical indication. Therefore, the purpose of the current third generation IVF technology is not to perform gender selection, but to screen out disease-causing genes and block the transmission of disease-causing genes with the offspring. Some special patients, such as those with Y chromosome microdeletion, are recommended to undergo sex screening to choose to have a girl because their offspring will develop the disease if they have a boy. Now that the country has liberalized the second child, from the perspective of natural fertility and natural pregnancy, the ratio between men and women basically tends to be balanced, so it is basically unnecessary to perform gender selection with the help of three generations of IVF technology.