Investigating fertility problems.

A 29 year old nulliparous woman was referred to the radiology department by her gynaecologist for a hysterosalpingogram. She had been trying unsuccessfully to conceive for 15 months. She had no medical, surgical, or gynaecological history. She had never been pregnant. Her body mass index was normal and she was a non-smoker. She described a regular 28 daymenstrual cycle, with periods—which were not heavy or painful—lasting between five and six days. She had no history of sexually transmitted diseases. Day 21 progesterone concentrations indicated that she was ovulating and her partner’s semen analysis was normal. The couple were having regular intercourse. A chlamydia test was negative. Hysterosalpingographywas carried out (fig 1).