These three tests may be used during a fertility evaluation, but each provides different information.

HSG (Hysterosalpingogram)
An HSG uses X-rays and contrast dye to examine the uterine cavity and determine whether the fallopian tubes are open or blocked. It is particularly useful when evaluating possible tubal-factor infertility.

SHG (Sonohysterogram / Saline Infusion Sonography)
An SHG uses ultrasound while sterile saline is placed inside the uterus. This helps provide a clearer view of the uterine cavity and lining and may identify polyps, fibroids, scar tissue, or abnormalities in the shape of the uterus.

Transvaginal Ultrasound (TVUS)
A transvaginal ultrasound uses an ultrasound probe placed in the vagina to examine the uterus, endometrial lining, ovaries, and follicles. It can help assess conditions such as ovarian cysts, fibroids, follicle development, and antral follicle count.

In simple terms:
• HSG: Are the fallopian tubes open?
• SHG: What does the inside of the uterus look like?
• TVUS: What do the uterus, ovaries, lining, and follicles look like?

Your healthcare provider may recommend one or more of these tests depending on your fertility history and individual needs.