· By Lavanya Devakumar
HSG Test for Fertility: What to Expect and How to Prepare
If your doctor has suggested an HSG test, it’s completely normal to feel nervous. Many women hear about it during a fertility evaluation and immediately wonder: Will it hurt? What will they find? Can I try to conceive afterwards?
An HSG test, also called a hysterosalpingogram, is an X-ray test used to look at the shape of the uterus and assess whether the fallopian tubes are open or blocked. It is commonly used during infertility testing because open fallopian tubes are important for sperm and egg to meet naturally.
What is an HSG test?
An HSG test uses a contrast dye and X-ray imaging to show the inside of the uterus and fallopian tubes. During the test, dye is gently passed through the cervix into the uterus. If the fallopian tubes are open, the dye usually flows through them and spills into the pelvic area, where the body absorbs it naturally.
Doctors may recommend an HSG test to check for:
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Blocked fallopian tubes
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Uterine shape concerns
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Scar tissue or adhesions
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Possible causes of difficulty getting pregnant
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Recurrent pregnancy loss evaluation, depending on your case
ASRM notes that HSG is used to evaluate tubal patency as part of fertility testing.
When is an HSG test usually done?
An HSG test is usually scheduled after your period ends but before ovulation. This timing helps reduce the chance of doing the test during an early pregnancy. Your clinic may also ask you to take a pregnancy test before the procedure.
If you are tracking your cycle closely, you may also find it helpful to read Apphia’s guide on when to take a pregnancy test.
How to prepare for an HSG test
Your doctor’s instructions should always come first, but common preparation steps include:
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Schedule it at the right time
Most clinics prefer doing the test in the first half of your cycle, after bleeding stops and before ovulation. -
Ask about pain relief
Some doctors suggest taking an over-the-counter pain reliever before the test, especially if you usually experience cramps. Follow only what your doctor approves. -
Tell your doctor about allergies
Let your provider know if you have a history of iodine, contrast dye, or medication allergies. ASRM lists iodine allergy as one of the recognized HSG-related risks. -
Mention infections or pelvic pain
If you have an active pelvic infection, fever, unusual discharge, or severe pelvic pain, tell your doctor before the appointment. -
Bring a pad
Some dye and light spotting may come out after the test, so a pad is useful. Avoid using a tampon immediately after unless your doctor says it is okay. -
Plan a lighter day
Many women return to normal activities afterwards, but you may feel cramps or tired. Give yourself space to rest.
What happens during the HSG procedure?
The HSG test is usually quick. The procedure itself often takes only a few minutes, though your full appointment may take longer.
Here’s what usually happens:
You lie on an X-ray table, similar to a pelvic exam. A speculum is placed in the vagina so the cervix can be seen. A thin tube is passed through the cervix, and contrast dye is slowly injected into the uterus. X-ray images are taken as the dye moves through the uterus and fallopian tubes.
You may feel pressure, period-like cramps, or discomfort when the dye enters the uterus and tubes. For some women, it is mild. For others, it can feel more intense, but it usually passes quickly.
Does an HSG test hurt?
An HSG test can be uncomfortable, but the pain level varies from person to person. Some women describe it as mild cramping, while others feel stronger cramps for a short time.
Discomfort may depend on factors like cervical sensitivity, anxiety, tube blockage, or how strongly your uterus reacts to the dye. Deep breathing, relaxing your pelvic muscles, and knowing the steps in advance may help you feel more in control.
What to expect after an HSG test
After the test, mild cramping, dizziness, nausea, sticky discharge, and light spotting can happen. Cleveland Clinic and ACOG both list cramping, dizziness, nausea, and slight vaginal bleeding as possible after-effects.
Call your doctor if you notice:
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Fever
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Heavy bleeding
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Severe or worsening pelvic pain
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Foul-smelling discharge
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Pain that does not improve
These symptoms may need medical attention, especially because infection is a rare but possible complication. ASRM notes that serious complications from HSG occur in less than 1% of cases.
What do HSG test results mean?
If the dye flows through both fallopian tubes and spills out, it usually means the tubes are open. If dye does not pass through one or both tubes, it may suggest a blockage. The test can also show certain uterine cavity concerns, such as shape differences or possible scarring.
Important note: an abnormal HSG result does not always mean you cannot get pregnant. Sometimes results need to be confirmed with another test or reviewed alongside your full fertility history.
Your doctor may discuss next steps, such as ovulation tracking, semen analysis, ultrasound, laparoscopy, IUI, IVF, or treatment for any specific issue found.
For cycle tracking basics, you can also read Apphia’s blog on understanding your menstrual cycle.
Can an HSG test improve fertility?
Some studies suggest fertility may slightly increase for a short time after a normal HSG, but the issue is still debated. ASRM says the possible fertility boost is controversial and that most doctors perform HSG mainly for diagnosis.
So, it is better to think of HSG as an information-giving test, not a fertility treatment.
When can you take a pregnancy test after an HSG?
Your doctor will guide you on when to resume intercourse or try to conceive after the test. If you try later in the same cycle and miss your period, you can test based on your expected period date.
When you feel prepared to test, Apphia’s Early Detection Pregnancy Test 15-Pack can help you test at home with confidence during your TTC journey.
Final thoughts
An HSG test can feel intimidating, especially when you are already carrying the emotional weight of trying to conceive. But it can also give helpful answers about your uterus and fallopian tubes, and those answers can guide your next step.
Be gentle with yourself before and after the appointment. Ask your doctor every question you have. Your TTC journey deserves clarity, care, and support.
FAQs
Is an HSG test the same as a pregnancy test?
No. An HSG test checks the uterus and fallopian tubes. A pregnancy test checks for hCG, the pregnancy hormone.
How long does an HSG test take?
The imaging part is usually quick, often only a few minutes, but the full appointment may take longer.
Can I go back to work after an HSG test?
Many people can return to normal activities, but cramps or spotting may happen. Rest if your body needs it.
Is radiation from HSG dangerous?
HSG uses X-ray imaging, but the exposure is generally low. Your doctor schedules it before ovulation to avoid exposing an early pregnancy.
What should I avoid after an HSG?
Follow your clinic’s instructions. Many doctors suggest avoiding tampons, intercourse, or swimming for a short time after the test to reduce infection risk.