Gynaecology• Updated 21 October 2026
HSG (Tube Test)
An X-ray test with dye to check whether the fallopian tubes are open.
Results: Same day
Quick Summary
Primary Purpose
To check for blocked fallopian tubes in infertility.
What It Measures
Shape of the womb and whether the tubes are open.
Preparation
Done after your period and before ovulation; take a painkiller beforehand if advised.
Overview
Dye is passed through the cervix and X-rays are taken.
It can cause cramping.
What It Measures
Tubes
Open or blocked.
Womb shape
Abnormalities.
How It's Performed
- 01
Speculum
Gently inserted.
- 02
Dye
Passed through the cervix.
- 03
X-rays
Taken as dye flows.