Published September 14th, 2026

A hysterosalpingogram (HSG) is a specialized X-ray procedure used to evaluate the uterus and fallopian tubes, crucial structures in female fertility. During this test, a contrast dye is gently introduced into the uterine cavity, allowing real-time imaging to reveal any blockages in the fallopian tubes or abnormalities within the uterus. Identifying such issues is often a key step in diagnosing causes of infertility, guiding appropriate treatment options. The HSG procedure involves careful preparation and specific timing within the menstrual cycle to ensure safety and accuracy. Understanding what to expect-from the initial steps through to image interpretation-helps patients navigate this diagnostic process with greater confidence. At Mooney MD Center for Reproductive Care, expertise in reproductive endocrinology and infertility informs the use of HSG as part of a broader assessment, supporting personalized care and informed decisions for couples and families facing fertility challenges.

Preparing for Your HSG: Timing, Precautions, and What to Expect

Preparation for a hysterosalpingogram starts with timing. We usually schedule an HSG after menstrual bleeding has stopped but before ovulation, often between cycle days 6 and 10. This window lowers the chance of performing the test during an early pregnancy and reduces infection risk while the cervix is still relatively closed.

Before scheduling, we review recent cycles, any irregular bleeding, and prior infections such as pelvic inflammatory disease. Active pelvic infection, heavy bleeding, or suspected pregnancy lead us to delay the test until it is safer.

Allergies are important to discuss in advance, especially any reaction to iodine, shellfish, or prior contrast dye used in imaging tests. We also ask about asthma, prior anaphylaxis, or contrast reactions in close relatives, as these details guide our choice of contrast and pre-medication. If there is concern about specific contrast dye types, we explain alternatives and the risks and benefits of each.

Medication review includes blood thinners, diabetes medications, and any antibiotics or pain medicines you already use. We usually outline whether to take regular medicines on the day of the HSG and whether to eat beforehand. Some patients take an over-the-counter pain reliever about an hour before the procedure to lessen cramping.

If sedation is planned, arranging transportation home is essential. Even without sedation, some patients prefer not to drive if they expect cramping or feel anxious about the test. Light activity afterward is usually acceptable, but we recommend avoiding strenuous exercise for the rest of the day.

Many people feel nervous about an HSG because they expect pain or worry about the results. At Mooney MD Center for Reproductive Care, we use private consultation rooms and structured patient education to review the steps, expected sensations, and options for comfort in advance. That preparation often makes the actual test experience more predictable and easier to manage.

Step-by-Step Overview of the HSG Procedure

Once preparation is complete and consent is confirmed, the hysterosalpingogram begins in the X-ray suite. You lie on your back on the table, usually with knees bent and feet supported, similar to a pelvic exam. We position a drape for privacy and review the steps again before starting.

A speculum is gently inserted into the vagina to allow clear access to the cervix. This part often feels like a routine Pap test: pressure, but not usually sharp pain. We clean the cervix with an antiseptic solution to lower infection risk, which can cause a brief cool or wet sensation.

Next, we place a thin, flexible catheter through the cervical opening into the lower uterine cavity. Some people feel a pinch or brief cramp as the catheter passes the cervix. We may use a small balloon on the catheter or a soft tenaculum on the cervix to keep everything steady; this supports accurate imaging but can add a moment of pressure.

After the catheter is in place, we remove the speculum so the X-ray equipment can move freely. You stay in the same general position but we may adjust your hips or legs slightly. We then begin the contrast injection. Contrast dye travels through the catheter into the uterus and toward the fallopian tubes while we watch with fluoroscopy, a type of continuous X-ray imaging.

During contrast injection, many patients notice menstrual-like cramps or pelvic pressure as the uterus stretches slightly. Cramping often peaks during the slow infusion of contrast and eases within a few minutes. Pre-procedure pain medicine, gentle breathing, and clear communication about what you are feeling all reduce discomfort. For those with high anxiety, past painful procedures, or known cervical stenosis, we discuss additional pain management options ahead of time.

On the fluoroscopy screen, we follow the contrast as it outlines the uterine cavity, then see whether it spills freely through the fallopian tubes or stops abruptly. This real-time view allows us to identify possible blockages, scarring, or structural changes. We capture a series of images during different phases of dye flow to support later HSG result interpretation.

Once enough images are obtained, we stop the contrast, deflate any balloon, and gently remove the catheter. Cramping usually eases quickly as the uterus relaxes and residual dye begins to drain. We provide a pad for light spotting or leakage of contrast. In a reproductive endocrinology setting such as Mooney MD Center for Reproductive Care, the entire process is organized to balance diagnostic accuracy with attention to comfort, clear explanations, and careful monitoring throughout the hsg x-ray exam.

Understanding the Risks And Safety Considerations of HSG

Every medical test carries some risk, and hysterosalpingography is no exception. In reproductive endocrinology practice, HSG is considered a low-risk imaging study when performed by experienced clinicians with clear protocols, such as those we follow at Mooney MD Center for Reproductive Care.

The main concern after an HSG is infection, usually involving the uterus, fallopian tubes, or pelvis. The overall rate is low, especially when we screen for recent pelvic infections and schedule the study early in the cycle. In some higher-risk situations, we prescribe preventive antibiotics. Fever, worsening pelvic pain, or foul-smelling discharge in the days after the test require prompt medical review.

Allergic reactions to contrast dye range from mild itching or hives to more serious breathing difficulty or blood pressure changes. Careful review of prior reactions to iodine or other contrast agents guides our dye selection and any pre-medication. During the HSG procedure, we monitor symptoms and stop the study immediately if a reaction begins.

Radiation exposure from an HSG is limited and kept within diagnostic standards by using fluoroscopy only as long as needed for clear images. The dose is higher than a single X-ray but far below levels linked with long-term harm, and the test is timed to avoid early pregnancy.

Discomfort, cramping, and spotting are common but short-lived. Mild pelvic cramps can persist for several hours, and light bleeding or passage of contrast may continue through the day. We advise using a sanitary pad, resting as needed, and avoiding intercourse, tampons, and strenuous exercise for the remainder of the day.

After the procedure, we review warning signs that should prompt urgent contact with a clinician: severe or increasing pelvic pain, heavy bleeding (soaking pads), fever or chills, faintness, or difficulty breathing. With 27 years of clinical and surgical experience guiding our protocols, we monitor closely during and immediately after the HSG, then use the images and your symptoms together to move into clear interpretation of the results and next steps in fertility planning.

Interpreting HSG Results: What They Mean for Fertility Evaluation

Hysterosalpingogram images give a moving outline of the uterine cavity and fallopian tubes as contrast travels through them. During review, we trace the dye path frame by frame, ask about any discomfort you felt at specific points, and match symptoms with what we see on the screen.

When the contrast fills the uterus smoothly and then spills out of both tubes into the pelvis, we describe the tubes as patent or open. In that setting, an HSG supports normal fallopian tube health and shifts our focus toward other parts of the fertility evaluation, such as hormone testing, ovulation tracking, follicle monitoring ultrasound, or semen analysis.

If contrast moves partway through a tube and then stops abruptly, we consider a tubal blockage. A block close to the uterus (proximal) sometimes reflects temporary spasm or mucus plugging, while a block farther out (distal) raises concern for prior infection, endometriosis-related scarring, or past surgery. In these cases we talk through whether to repeat imaging, add further testing, or consider treatments that bypass the tubes, such as IVF.

HSG also shows the shape and contour of the uterine cavity. A smooth, triangular cavity supports embryo implantation. Irregular filling, filling defects, or areas where dye does not outline the wall suggest polyps, fibroids that project into the cavity, adhesions, or a structural variation such as a septum. These findings often lead to discussion about office hysteroscopy or surgical correction to improve implantation conditions.

Isolated HSG findings rarely stand alone. At Mooney MD Center for Reproductive Care, we place HSG results alongside menstrual history, detailed reproductive endocrinology assessment, hormone profiles, semen analysis, and ultrasound monitoring for ovulation or early pregnancy. We then review options together, outline the likely impact on conception, and adjust the treatment plan stepwise so that decisions match the medical picture and the couple's goals.

The hysterosalpingogram remains a key diagnostic tool for evaluating uterine and fallopian tube health, essential factors in understanding and addressing fertility challenges. Proper preparation, clear expectations about the procedure, awareness of potential risks, and expert interpretation of results all contribute to a more effective fertility evaluation process. Patients benefit from integrating HSG findings with other diagnostic services such as hormone testing, semen analysis, and ultrasound monitoring for IUI and IVF to develop informed, individualized treatment plans. Mooney MD Center for Reproductive Care offers these specialized reproductive endocrinology services with a patient-centered approach, including private consultation rooms, on-site laboratory services, and educational resources to support each step of the journey. Serving Northeast Ohio in person and multiple states via telemedicine, the center invites individuals and couples to get in touch to explore whether HSG or related fertility assessments are appropriate for their unique needs and to receive guidance tailored to their reproductive goals.