(1) To know whether the fallopian tube is unobstructed, and to determine the blocking position that leads to infertility, so as to provide basis for surgical treatment.

(2) Determine the types of reproductive tract malformation.

(3) Observe the shape of uterine cavity to see if there are submucosal hysteromyoma and endometrial polyps.

(4) Observe whether the cervix is slack, whether there is deep laceration and whether there is abnormality in the uterus, so as to determine habitual abortion.

(5) Looking for intrauterine adhesions. After induced abortion or natural abortion curettage, the amount of menstruation is obviously reduced, and amenorrhea, dysmenorrhea and intrauterine adhesion may occur.