Precautions before hysterosalpingography: (1) 3-7 days after menstruation, no sexual intercourse. (2) Pre-operative gynecological examination to exclude inflammation of the reproductive tract and prohibit the examination if you have serious systemic diseases and cannot tolerate the procedure. (3) If you have a history of iodine allergy or are suffering from hyperthyroidism during treatment, this test is prohibited. (4) Urine pregnancy test. (5) Bring a companion to the infertility clinic for an appointment every Monday to Friday morning.