HSG testing: Preparing for a Fallopian Tube Assessment
A hysterosalpingogram, or HSG, uses X ray images and contrast liquid to examine the womb cavity and whether the fallopian tubes appear open. It is one part of a fertility assessment. Preparing well means following the service’s instructions and knowing what to expect, rather than assuming every clinic uses the same booking rules.
Confirm timing and pregnancy precautions
HSG must not be performed during pregnancy. It is commonly arranged after menstrual bleeding finishes and before ovulation is expected. Ask when to contact the service, how it counts cycle days and what to do if periods are absent or irregular.
Follow its instructions about avoiding pregnancy before the test. Some services require no intercourse from the start of the period until after the investigation. If you have not followed the instructions or pregnancy may be possible, contact the team before attending. A pregnancy test on the day does not replace the preparation advice.
Tell the team about relevant health concerns
Report previous reactions to contrast, other allergies, pelvic infection or unusual discharge. Ask whether infection screening has been completed and whether antibiotics are indicated in your circumstances. Do not take leftover antibiotics or assume they are routinely needed by everyone.
Discuss pain relief before the appointment, including which medicine is suitable for you and when to take it. Tell the team about a previously painful examination or difficulty tolerating a speculum. The first fertility appointment guide includes ways to discuss support and consent.
Understand what happens during the test
The examiner uses a speculum to see the cervix, then passes a thin tube through it to introduce contrast while images are taken. Cramping can occur as the liquid enters. Ask the examiner to explain each stage and tell them if pain is difficult to tolerate.
You can ask for the procedure to stop. An incomplete examination may require a different plan, which the team should discuss with you. HSG is different from a contrast ultrasound or an operation; the blocked tube investigation guide compares these approaches.
Leave with aftercare and results instructions
Mild cramping, fluid leakage and light spotting can happen afterward. Follow the clinic’s advice about pads, pain relief and resuming sex. Seek prompt medical attention for fever, chills, worsening or severe pain, heavy bleeding or unusual discharge, and say that you recently had an HSG.
New breathlessness after the test needs emergency assessment because a contrast reaction is possible, even though this is rare.
Confirm who will explain the report. Apparent blockage can sometimes reflect spasm or a technical issue and may need further investigation. Open tubes do not guarantee pregnancy. The result should be discussed alongside your history and other findings before deciding what happens next.
References
- Leeds Teaching Hospitals: HSG preparation, procedure and aftercare (opens in a new tab)
- Dudley Group NHS Foundation Trust: Hysterosalpingogram patient information (opens in a new tab)
- ASRM: Fertility evaluation of infertile women (opens in a new tab)
- NICE: Fertility investigation recommendations updated in 2026 (opens in a new tab)
- NHS: Consent to examinations and treatment (opens in a new tab)
- Rotherham NHS Foundation Trust: HSG complications and when to seek help (opens in a new tab)
