Who is recommended to undergo hysterosalpingography? (1) those who have been infertile for more than one year, with regular menstruation, dominant follicles developing and expelling in the natural cycle, and normal semen routine in the male partner; (2) those who have irregular or sparse menstruation, no ovulation or poor follicular development in the natural cycle, and normal semen routine in the male partner, and the female partner is still infertile after 3-6 cycles of ovulation treatment; (3) those who have a history of ectopic pregnancy (at least one fallopian tube is preserved) and have been trying to conceive for at least six months (3) If the woman has a history of ectopic pregnancy (with at least one tube preserved) and has been infertile for at least six months after trying to conceive, or if distortion, adhesions or cystostomy are found during tubal surgery; (4) If previous tubal lavage is suspected to be incompetent, or if the ultrasound reveals signs of hydrosalpinx. Who is not recommended to have hysterosalpingography? 1) If the male partner has severe weak sperm or azoospermia and does not receive donor insemination, no hysterosalpingography is needed and IVF is recommended; 2) If the female partner is over 40 years old, or although she is not over 40 years old but has decreased ovarian reserve function and has been infertile for more than six months, IVF is recommended directly; 3) If the female partner has had tubal lysis, revision or stoma and has been infertile for at least six months after the operation. IVF is recommended. Precautions for hysterosalpingography 1) Reproductive tract infections, especially gonococcal and Chlamydia trachomatis infections, should be ruled out before the procedure; 2) Make an appointment at the center as early as possible after the onset of menstruation; 3) The examination should be performed on the 9th-12th day of menstruation, depending on each individual’s menstrual cycle and period; 4) If iodine-containing contrast is used, iodine allergy should be ruled out before the procedure; 5) With iodine oil contrast, a diffusion film should be taken after 24 hours, and iodine water 6) Iodine-containing contrast agents are prohibited in patients with hyperthyroidism, and ultrasound-guided hysterosalpingography is recommended for patients with hyperthyroidism and iodine allergy, who should use gas-containing contrast agents. 7) Some patients may feel pain due to cervical dilatation and tubal spasm or blockage during contrast surgery. (8) After the imaging procedure, sexual intercourse should be prohibited for half a month, and oral antibiotics are usually needed to prevent infection.