The reasons for not getting pregnant three months after having a hysterosalpingogram may be ovulation disorders, pelvic factors, uterine body lesions, cervical reasons, etc. 1. Ovulation disorder: (1) Ovarian lesions: such as polycystic ovary syndrome, congenital gonadal hypoplasia, premature ovarian insufficiency and other causes. (2) Hypothalamic lesions: such as gonadotropin anovulation. (3) Pituitary lesions, such as hyperprolactinemia. (4) Others: such as thyroid dysfunction or congenital adrenal hyperplasia. (2) Pelvic factors: hydrosalpinx, peripheral adhesions and impaired function of the fallopian tubes due to adhesions after pelvic surgery, etc. 3. Uterine body lesions: such as intermural leiomyoma with large size affecting the shape of the uterine cavity, adenomyosis and so on. 4. Cervical causes: such as cervical lesions. Clinically, when you don’t get pregnant three months after having a hysterosalpingogram, you need to undergo relevant examinations under the guidance of your doctor, such as ultrasound, endocrine examination, etc., in order to find out the cause and actively treat it.