Checking for hermaphroditism generally means checking for chromosomes, and children generally do not need to undergo chromosomal examination before cryptorchidism surgery, but hormone levels, chromosomes and other related examinations are needed if there is anorchidism or cryptorchidism combined with hypospadias. Cryptorchidism refers to the testicle stops on the way of descending, not descending to the scrotum. Generally, before cryptorchidism surgery, it is necessary to carry out blood routine, liver and kidney function, electrocardiogram, ultrasound examination, etc., in order to detect the location of cryptorchidism and exclude contraindications to surgery, usually without chromosome examination. However, for severe cryptorchidism with phenotypic gender dysphoria, especially for those with hypospadias, sex chromosome and sex hormone tests should be performed to make a clear diagnosis, with special attention paid to differentiating from true or pseudohermaphroditism. If children have cryptorchidism, they should consult the doctor and get treatment as soon as possible.