A hysterosalpingogram (HSG) is a minimally invasive procedure which uses a dye (contrast) and radiation to visualise the uterine cavity and fallopian tubes, to assess for uterine abnormalities and tubal obstruction. Your doctor will request for this procedure to be performed with either water-soluble contrast (Omnipaque) or oil-soluble contrast (Lipiodol).

HSG can help to diagnose endometrial polyps, fibroids and scarring, and is part of an assessment for fertility problems.