Does pelvic MRI or ultrasonography provide the same information as HSG?
MRI and US are excellent for showing the anatomy of the uterus but are poor for showing the normal fallopian tubes, which are very small in size. Dilated fallopian tubes (hydrosalpinx) can be identified on MRI and US, but abnormality in nondilated tubes is best seen on a hysterosalpingogram. Tubal causes of infertility are the most common etiology of female infertility.
