Understanding Abnormal HSG Results

What Do Abnormal HSG Results Mean?

A hysterosalpingogram, commonly called an HSG, is an X-ray procedure used to evaluate the inside of the uterus and determine whether the fallopian tubes appear open. During the test, contrast dye is introduced through the cervix while X-ray images are taken as the dye moves through the uterine cavity and fallopian tubes.

An abnormal HSG result means the images identified something that differs from the expected appearance or flow of dye. This may include a fallopian tube that appears blocked, an abnormal shape within the uterine cavity or another finding that warrants additional evaluation.

Possible Abnormal HSG Findings

Different HSG findings can provide information about different parts of the reproductive tract. Possible results may include:

• One blocked fallopian tube: Dye does not appear to pass through one tube as expected.
• Both fallopian tubes blocked: Dye does not pass through either tube, which may prevent sperm and egg from meeting naturally.
• Hydrosalpinx: A fallopian tube appears dilated and filled with fluid, often as a result of previous inflammation or damage.
• Possible uterine cavity abnormality: The shape of the dye within the uterus may suggest a polyp, fibroid, adhesion or structural difference that requires further evaluation.
• Proximal tubal blockage: A tube appears blocked near where it connects with the uterus. In some cases, temporary muscular spasm during the procedure can contribute to this appearance.
• Distal tubal blockage: A tube appears blocked closer to its outer end near the ovary.

An HSG provides important structural information, but it does not evaluate every possible fertility factor. Your physician interprets the result alongside ovarian reserve testing, ovulation, semen analysis and your reproductive history.

How Abnormal HSG Results May Affect Fertility

The fertility implications of an abnormal HSG depend on what the test shows. Because the fallopian tubes provide the pathway for sperm and egg to meet and for a fertilized egg to reach the uterus, tubal blockage or damage can interfere with natural conception.

If one fallopian tube appears open and healthy, pregnancy without IVF may still be possible depending on other fertility factors. When both tubes are blocked, sperm and egg cannot typically meet through intercourse or IUI, and IVF may be considered because it allows fertilization to occur outside the fallopian tubes.

A hydrosalpinx can be particularly relevant to IVF planning. Fluid within a damaged fallopian tube may enter the uterine cavity and can negatively affect implantation, so your physician may recommend addressing a hydrosalpinx before embryo transfer.

Findings involving the uterine cavity may raise different questions. Polyps, fibroids, adhesions or congenital differences can vary substantially in their location and significance, and not every finding requires treatment. Your Spring Fertility physician can determine whether additional evaluation of the uterine cavity is appropriate and how the HSG findings fit into your overall fertility plan.

What Happens After an Abnormal HSG?

The appropriate next step after an abnormal HSG depends on the specific finding. If the test suggests that a fallopian tube is blocked, your physician may consider whether the result is likely to represent a true obstruction or whether additional evaluation is needed. Findings involving the uterine cavity may similarly require more detailed assessment before determining whether treatment is appropriate.

If one fallopian tube is open and other fertility factors are reassuring, treatment recommendations may differ from those for a patient whose HSG suggests that both tubes are blocked. When significant tubal disease or hydrosalpinx is present, your physician may discuss whether IVF or treatment of the affected tube should be considered.

Uterine findings may lead to additional imaging or procedures that allow the uterine cavity to be evaluated more directly. Whether a polyp, fibroid, adhesion or structural difference needs to be addressed depends on its location, extent and potential relevance to implantation or pregnancy.

Your Spring Fertility physician can interpret the HSG together with ovarian reserve testing, ovulation, semen analysis and reproductive history to determine the most appropriate next step. The objective is to understand whether the HSG finding represents a meaningful fertility barrier and, if so, identify a treatment strategy that addresses it.