HSG Test: What to Expect from a Hysterosalpingogram
A key fertility test that checks your fallopian tubes and uterus. Here's what happens, how to prepare, and what your results mean.
An HSG is an X-ray test that checks if your fallopian tubes are open and examines your uterine cavity. Dye is injected through the cervix; X-rays show where it flows. The test takes 15-30 minutes. Most women experience cramping—some mild, some intense—but it's brief. Take ibuprofen beforehand. Results are immediate.
What an HSG Checks
- Whether your fallopian tubes are open (patent) or blocked
- The shape and structure of your uterine cavity
- Presence of fibroids, polyps, or scar tissue in the uterus
- Uterine abnormalities (septum, bicornuate uterus)
- Location of blockage if tubes are blocked
Blocked tubes are a common cause of infertility—if sperm and egg can't meet, pregnancy can't happen. The HSG is the primary screening test for tubal patency.
The Procedure Step by Step
How Much Does It Hurt?
Take ibuprofen: 600-800mg, 30-60 minutes before.
Breathe: Slow, deep breaths during dye injection help.
Bring support: Having someone drive you can reduce stress.
Ask about sedation: Some clinics offer mild sedation for anxious patients.
Find an experienced provider: Technique matters—skilled providers cause less discomfort.
Understanding Your Results
Some women get pregnant in the months following an HSG—even with "normal" results. The dye may clear minor blockages or debris from the tubes. Studies show a small fertility boost in the 3 months after HSG, especially with oil-based contrast. It's not a treatment, but it's a nice potential bonus.
Frequently Asked Questions
Yes! The HSG is scheduled before ovulation specifically so you can try that cycle. Some doctors recommend waiting a day or two after the test before having sex due to slight infection risk, but you can definitely try that month. In fact, the cycle after HSG may have slightly improved odds.
Options depend on the location and cause: (1) Proximal blockage sometimes clears with a repeat HSG or tubal cannulation. (2) Distal blockage may be treatable with surgery in some cases. (3) If both tubes are blocked, IVF bypasses the tubes entirely—eggs are retrieved directly from ovaries. One blocked tube with one open can still allow natural conception.
HSG is good but not perfect. False positives for blockage can occur if tubes spasm during the test. False negatives are less common but possible. If results don't match your clinical picture, your doctor may recommend laparoscopy for a definitive look. For uterine abnormalities, saline sonogram (SIS) or hysteroscopy may provide more detail.
Yes, but it's minimal—equivalent to a few days of natural background radiation. The test is done before ovulation to avoid any possible early pregnancy. The small radiation exposure is considered safe and far outweighed by the diagnostic benefit.
HSG uses X-ray and contrast dye; it's better for evaluating tubes. Saline sonogram (SIS/sonohysterogram) uses ultrasound and saline; it's better for evaluating the uterine cavity in detail but can't assess tube patency well. Some doctors do both. SIS is generally less uncomfortable than HSG.
The Bottom Line
The HSG is a quick, important test that provides crucial information about your fallopian tubes and uterus. Yes, it can be uncomfortable—but it's brief, and the information is worth it.
Take ibuprofen, breathe through it, and remember: most women say it wasn't as bad as they feared. And getting answers is the first step toward your path forward.
Medical Disclaimer: This content is for informational purposes only and does not constitute medical advice. Discuss HSG results and next steps with your healthcare provider.