Tubal Patency Testing
Tubal patency testing means checking that the fallopian tubes are open. Contrast fluid goes into the uterus through a fine catheter in the cervix. Someone then watches, on ultrasound or X-ray, whether it runs out along each tube and spills into the pelvis. Patency is the word for open. It is a same-day appointment, and for the common versions there is no anaesthetic.
It is also the one fertility test that does a little treating while it tests. Flushing the tubes appears to raise the chance of conceiving over the following few months, more so with oil-based contrast than water-based. Nobody is entirely sure why.
The other thing to know is how to read a result that is not clear-cut. Tubes are muscular, and a healthy one can clamp shut while fluid is pushing at it, so a single blocked side proves very little on its own. The decision that follows is not blocked or open. It is which test to have: the quick outpatient one, or a laparoscopy that looks directly and can fix what it finds.
At a glance
- Also known as
- HyCoSy, HyFoSy, HSG, hysterosalpingogram, tubal patency test, dye test, lap and dye
- Appointment time
- 15–30 minutes in the room
- Back to normal
- Same day; an easy afternoon is sensible
- Whole process
- One appointment, plus the follow-up that reads it
- Typical cost
- $400–$1,200 (United States, self-pay)
Figures reviewed .
On this page
Who it’s for
Anyone a year into trying without a pregnancy, as part of the standard first round. It moves up the list fast if there is anything in the history that scars tubes. A previous chlamydia infection or episode of pelvic inflammatory disease, an ectopic pregnancy, a ruptured appendix, endometriosis, a caesarean or any other pelvic operation. Periods that have got steadily more painful over years belong on that list too.
It matters most for anyone hoping to avoid IVF. Whether the tubes are open is the entire question behind whether timed cycles or insemination have anything to work with. IVF does not use them, which is why this result changes the plan more than it changes the diagnosis.
Two groups can reasonably wait. If a semen analysis has not been done yet, do that first. It is cheaper, faster and far more comfortable, and it makes sense to have the whole picture together. A clinic that tests you both at once makes the best use of your time.
And if IVF is already the plan, a patency result may change nothing. Most clinics still want to know the cavity of the uterus looks normal.
Before you book
Ask whether the clinic screens for chlamydia first, and whether that swab is included or something you have to arrange yourself. Pushing fluid through an untreated infection is the one complication worth real effort to avoid, and a careful unit will have this covered.
How it’s done
There are three ways to do it, each suited to a slightly different question.
HyCoSy, or HyFoSy where a foam contrast is used instead of saline and air, is the ultrasound version. A speculum goes in, the cervix is cleaned, a fine catheter is threaded through it, and contrast is pushed in while a transvaginal probe follows the fluid along each tube. It shows the cavity and the passage, and it adds no radiation. Most clinics reach for it first now, because the machine doing it is the same one that did your follicle count.
An HSG is the X-ray. Iodinated dye goes in the same way and a short series of images is taken as it fills the uterus and runs out of the tubes. The outline it gives of the cavity is sharper than ultrasound manages, which is why it is still preferred when the shape of the uterus is part of the question. The radiation dose is small, on a par with a plain abdominal film.
A laparoscopy with dye is the reference standard and the only one that sees the outside of the tubes. Under general anaesthetic a camera goes in through the navel, dye is pushed up through the cervix, and the surgeon watches it spill from the far end of each tube. That is also the view that finds endometriosis and adhesions, neither of which shows on a scan. The same operation can divide adhesions or open a blocked end while it is in there.
It is worth being prepared for the discomfort, because preparation makes a real difference. Most people describe strong period cramping for the minutes the fluid is going in, easing over the next hour or two. It is worse when a tube is blocked, because the fluid has nowhere to go.
Take painkillers beforehand rather than after, and ask the clinic what they suggest and when. If smears or a coil fitting have gone badly for you, say so. Some units offer local anaesthetic to the cervix, and some will book the laparoscopy instead. The people who find it easiest are the ones who know in advance that it will cramp, and that it passes quickly.
The morning of the test
Take whatever painkiller the clinic recommended before you leave the house, not once the cramping starts. It needs time to work and the sharp part is over in minutes. Plan a slow journey home rather than a meeting.
After the tubal check
You walk out. The cramping settles over an hour or two, and light spotting for a day or so is normal, along with a watery discharge as the contrast drains away. Plenty of people go back to work the same afternoon, though an easy afternoon is a kind thing to plan for yourself.
The laparoscopy is a different day altogether. General anaesthetic, shoulder tip pain from the gas used to inflate the abdomen, and a few days of feeling wrung out before normal returns over a week or two.
Then there is the window. If the flushing effect is doing anything, and the evidence points that way, the months right after the test beat the months before it. It is a bonus rather than a plan, but it is a good reason to keep things moving after the test.
| Booking | Timed after a period and before ovulation. Infection swab or antibiotic cover sorted out first. |
|---|---|
| Test day | Under half an hour in the room. Strong cramping while the contrast goes in, easing within an hour or two. |
| That evening | Cramping gone or nearly. Light spotting and a watery discharge as the contrast drains. |
| Days 1–2 | Spotting stops. Back to normal, with nothing to avoid unless the clinic said otherwise. |
| Weeks 1–2 | Report and images available. The appointment that reads them is where a result becomes a plan. |
| Months 1–3 | Next step under way: a repeat, a laparoscopy, or carrying on as you were, depending on what was seen. |
In the weeks after
Book the follow-up before you leave the building, while there is still somebody in front of you to book it with. The appointment that reads the pictures is where a result turns into a plan, and booking it on the day keeps things moving.
Risks and complications
Infection is the one that matters. Pushing fluid up through the cervix can carry bacteria with it. If chlamydia is sitting there undetected, the result can be pelvic inflammatory disease, which damages the very tubes the test was meant to assess. A swab beforehand or antibiotic cover is standard, and worth confirming rather than assuming.
Fainting is common enough to plan for. The cervix is sensitive, and a vasovagal episode, going grey and sweaty as the blood pressure drops, catches a minority of people during the test or just after. It passes lying flat with your legs up, and the staff have seen it many times over.
Radiation is a common worry, and the reassuring news is that the HSG dose is low. Iodine allergy is the rarer concern, so mention any past reaction to contrast. The laparoscopy carries surgical risk, because it is surgery: the anaesthetic, bleeding, and a small chance of injury to bowel or bladder.
One more point is about reading the result. A single blocked side on a single scan can be caused by spasm or a difficult catheter in tubes that turn out to be fine, so ask what the next step is before agreeing to anything on the strength of one image.
The tubal check results
A clean result says both tubes filled and spilled. Patent bilaterally is how it reads on the report, and it is the answer most people get.
One tube reported blocked is the ambiguous middle, and worth talking through carefully. Ask whether the fluid failed to pass or whether the tube went into spasm, and whether whoever was watching could tell the difference. Repeating the test, or going on to a laparoscopy, is often more use than acting on it. Both tubes blocked points clearly to IVF, which works well because that route never involves the tubes.
The pictures say something about the uterus on the way past. A fibroid pushing into the cavity, a polyp, a septum, an outline that is not the shape it should be. Those findings sometimes matter more than the tubes did, and the X-ray version shows them better than ultrasound.
The test shows whether a tube is open rather than how well it works. Tubes move an egg along by muscle and by the beating of tiny hairs, which no scan can measure, and that is simply the scope of the test.
Alternatives to the tubal check
The real choice is which version, and that depends on the question you need answered.
If the only question is whether the tubes are open, the ultrasound version answers it and is the least unpleasant of the three. If the shape of the uterus is also in doubt, the X-ray gives the better outline.
Where pain is part of the story, going straight to the laparoscopy has the better case. Periods that stop you working, pain during sex, a suspicion of endometriosis. It is the one that sees the disease and the one that can treat it in the same sitting. Pain is the usual deciding factor.
Then there is the route that does not need the tubes at all. IVF collects eggs and places an embryo into the uterus, so the tubes play no part. That is why a blocked result reshapes the plan rather than ending it, and why one ambiguous picture is worth confirming before you move to IVF.
The tubal check cost
The gap between the outpatient versions and the laparoscopy is the whole cost story. A HyCoSy or an HSG is a short appointment priced like a scan. A laparoscopy is an operation with a theatre and an anaesthetist attached. Most people do not start there, and a clinic that suggests it will explain what it expects to find.
Ask what the quoted figure covers. The infection screen, the contrast, the clinician holding the probe, and the appointment where somebody explains the pictures can arrive as four separate line items. Ask whether you get the images or only a report, and whether another clinic would accept them. Getting the images as well as the report saves paying for a repeat later.
| Country | Self-pay | Public / insurance |
|---|---|---|
| United States HyCoSy or HSG at that range; laparoscopy with dye runs into several thousand more | $400–$1,200 | Diagnostic testing is covered by many plans even where treatment is not; check the facility fee separately |
| United Kingdom A private laparoscopy with dye is usually £3,000–£6,000 | £350–£900 | Available on the NHS within a fertility work-up once referral criteria are met |
| Australia Expect a gap payment; a laparoscopy is a day-surgery cost on top | A$300–$700 | The ultrasound and X-ray versions attract a Medicare rebate with a referral |
Choosing a clinic for the tubal check
You are choosing whoever holds the catheter, and how often they hold one. Threading a catheter smoothly is a knack, and a practised operator makes the appointment quicker and more comfortable. Ask how many the unit does in a week rather than in a year.
Ask who interprets it and whether you get the images. I would want a named person who can say what they saw, what they were unsure of, and what they would do next. That third answer shows a clinic that is managing your case, not just running a test.
Then ask the question that shows how they think. What would they do if one tube did not fill. A unit that says repeat it, or look properly with a laparoscopy, is making sure any fixable problem gets found and fixed before moving to IVF.
At the appointment
Ask the person doing the test to tell you what they are seeing as they go, if they are allowed to. Most will. Hearing that the fluid went through while it is happening is reassuring, and it gives you something concrete to ask about when the written report finally lands.
Clinics that do the tubal check
Frequently asked questions
Does the tubal check hurt?
It cramps for most people, strongly but briefly, for the few minutes the fluid is going in, and more if a tube is blocked. Take painkillers before you arrive and it is very manageable. See how it's done.
Is it true the test can help you conceive?
Flushing the tubes does appear to lift conception rates for a few months afterwards, more with oil-based contrast. Treat it as a bonus, not a treatment. See afterwards.
One tube came back blocked. Does that settle it?
Not on its own. A healthy tube can spasm shut during the test, so one blocked side on one scan is worth confirming. See results.
Which version should I have?
Ultrasound if the only question is whether the tubes are open, X-ray if the uterus is also in doubt, laparoscopy if pain suggests endometriosis. See alternatives.
Do I need it before IVF?
Not for the tubes, since IVF bypasses them. Clinics usually still want to know the cavity of the uterus looks normal before a transfer.