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Harvard Medical School
Tell your doctor if you have ever had an allergic reaction to x-ray dye or if you have had a recent infection in the pelvis. Definitely tell your doctor if there is a chance you might be pregnant. If you have regular periods, it is best to have this test done in the week right after your period ends. This is before ovulation occurs in your cycle, so there would be the least risk of exposing an early pregnancy to the dye used in this test. Some doctors will require you to have tests for pelvic infections before having a hysterosalpingogram.
Some doctors recommend that you take antibiotics before the test. If this is your doctor's practice, he or she will give you a prescription for this medicine.
You will need to sign a consent form giving your doctor permission to perform this test.