Ultrasound

Imaging misses endometriosis more often than most patients are led to believe. Ultrasound and MRI can be very helpful for suggesting endometriosis and for mapping certain patterns of disease (like ovarian endometriomas or some forms of deep disease), but a “normal” scan does not rule endometriosis out—especially superficial peritoneal disease, subtle lesions, or disease hidden in difficult-to-visualize locations.

How often it’s missed depends on what type of endometriosis you have, where it is, the scan protocol, and—crucially—the experience of the person performing and interpreting the study. It’s also common for one modality to see something the other doesn’t, because each has different blind spots (for example, bowel gas can limit MRI in some situations, while ultrasound may miss certain deep sites). That’s why our diagnostic process doesn’t hinge on imaging alone; we combine your symptom story, exam findings, and expert imaging interpretation to decide what’s most likely and what the next step should be.

If your symptoms persist despite “negative” imaging, that isn’t a dead end—it’s a data point. Reach out to schedule a consultation so our team can review your history and prior imaging, consider other conditions that can mimic or coexist with endometriosis, and determine whether advanced imaging, further evaluation, or surgical assessment makes sense for your goals.

Yes. It’s very possible to have endometriosis even when an ultrasound and MRI are read as “normal,” because imaging is not a simple yes/no detector for all lesion types or locations. Scans are best at spotting certain patterns—like ovarian endometriomas or some deep disease—but superficial implants, small lesions, or disease hidden in less-visible areas can be missed. That’s why a normal scan should never automatically cancel out symptoms like cyclical pelvic pain, painful sex, bowel/bladder symptoms, or infertility.

In our evaluation process, we use imaging as one piece of the puzzle—often more for mapping suspected disease and planning safe surgery than for ruling endometriosis in or out. We put major weight on your full symptom story, flare patterns, and a careful exam, and we also look for conditions that can mimic or coexist with endometriosis (including adenomyosis, pelvic floor dysfunction, vascular causes of pelvic pain, and other drivers of inflammation). If your symptoms persist despite “normal” imaging, reach out to our team—our job is to connect the dots and build a clear, actionable plan toward diagnosis and lasting relief.

Hormonal birth control can absolutely make endometriosis harder to suspect on imaging—not because it reliably erases disease, but because it can quiet the inflammation and bleeding that drive more obvious findings. Many endometriosis lesions (especially superficial disease) aren’t consistently visible on ultrasound or MRI to begin with, so symptom suppression can create a “false calm” where scans look normal even when endometriosis is still present.

That said, expertly interpreted imaging can still identify certain patterns—like ovarian endometriomas, deep infiltrating disease, adhesions, and related conditions such as adenomyosis—even if you’re on hormones. When we evaluate you, we don’t rely on imaging alone; we combine your symptom story and flare patterns with a careful exam and targeted imaging review to distinguish endometriosis from look-alike or coexisting causes of pelvic pain. If you’re worried that birth control is masking what’s going on, reach out to our team—we can help map out a diagnostic plan that doesn’t depend on a single test.

Yes. Teens can absolutely have endometriosis even when an ultrasound looks “normal.” Many types of endometriosis—especially superficial disease or implants in certain locations—simply won’t show up on routine imaging, and pain severity doesn’t reliably match what any scan can see.

A normal ultrasound mainly helps rule out certain problems (like larger ovarian cysts or obvious masses), but it doesn’t exclude endometriosis or other conditions that can coexist with it and drive symptoms. That’s why our evaluation focuses first on your full story—when the pain started, how it flares across the cycle, bowel/bladder patterns, fatigue, missed school or activities, and what treatments have or haven’t helped—paired with a careful exam and, when appropriate, more expertly interpreted imaging like MRI.

If a teen has persistent painful periods, pelvic pain between periods, GI or urinary symptoms that cycle, or pain that’s not responding to typical first steps, we take that seriously and look for the full “why,” including endometriosis and look-alike or overlapping issues (like pelvic floor dysfunction or pain sensitization). If you’d like, you can reach out to schedule a consultation with our team so we can map out an individualized plan for diagnosis and next steps.

Usually, no bowel prep is needed for a standard transvaginal pelvic ultrasound used to evaluate suspected endometriosis. Most patients can eat, drink, and take medications as normal unless the imaging center gives you different instructions, and the key is simply arriving with whatever bladder filling they request.

Bowel prep is more commonly discussed when we’re specifically trying to “map” suspected bowel deep endometriosis—especially rectal involvement—using specialized imaging like an endorectal ultrasound, or when a radiology team has a particular protocol designed to improve visibility of the bowel wall and surrounding tissues. If your symptoms suggest bowel involvement, our team focuses on choosing the right type of imaging (and the right interpretation) so the results actually help guide next steps.

If you’re unsure what test you’re scheduled for, reach out to confirm whether it’s a routine transvaginal ultrasound or a bowel-focused study and what preparation, if any, is expected. We can also help you decide whether additional mapping would be useful based on your symptom pattern and exam findings.

“Restricted sliding” on a pelvic ultrasound usually refers to a limited “sliding sign,” meaning nearby pelvic structures don’t glide smoothly against each other when gentle pressure is applied with the ultrasound probe. In a typical pelvis, organs like the uterus, ovaries, bowel, and the space behind the uterus (often called the pouch of Douglas) should move freely relative to one another.

When sliding is restricted, it can suggest adhesions (scar tissue) or deep endometriosis that is tethering tissues together—sometimes described as “fixed” anatomy. It’s not a diagnosis by itself, and it doesn’t tell us the full extent of disease, but it’s a meaningful clue that can help guide next-step imaging and—if surgery is being considered—preoperative planning. If your report mentions restricted sliding along with symptoms like deep pelvic pain, painful sex, pain with bowel movements, or cyclical bowel/bladder flares, our team can help interpret what that combination may mean in your specific case and what evaluations are most useful next.

Low AMH (anti‑Müllerian hormone) means your ovarian reserve—your remaining pool of recruitable follicles—looks lower than expected for your age. In people with endometriosis, low AMH can happen for more than one reason: the inflammatory impact of the disease itself, the presence of an ovarian endometrioma, and/or prior ovarian surgery. It’s also important to know what AMH can’t tell you—it doesn’t diagnose endometriosis, it doesn’t measure egg quality directly, and it doesn’t predict whether you can or can’t conceive on your own.

With endometriomas in particular, one AMH number can miss what’s happening ovary-by-ovary. We often look at AMH alongside an antral follicle count (AFC) on ultrasound, because AFC can show the “local” effect of a cyst (for example, fewer follicles on the side with the endometrioma even if the other ovary is compensating). If fertility planning is part of your goals, our team can help interpret AMH in the full context—your imaging, symptoms, prior treatments, and timeline—so you’re not making big decisions based on a single lab value.

Yes—it can, especially when endometriosis involves the ovaries. An ovarian endometrioma can affect ovarian tissue through chronic inflammation and internal scarring (fibrosis), which may reduce ovarian function over time even if you’ve never had surgery.

That said, AMH is a single “whole-picture” blood test and doesn’t always capture what’s happening ovary-by-ovary. In people with endometriomas, the antral follicle count (AFC) on ultrasound—especially per ovary—may show a clearer local impact than AMH, and changes can relate to whether the cyst is one-sided vs both sides and how large it is.

If you’re seeing a lower AMH and trying to understand what it means for your timeline and options, we can help you interpret AMH alongside AFC, imaging findings, and your goals (pain control, fertility planning, or both) so you’re not making big decisions based on one number alone. If you’d like, reach out to schedule a consultation with our team.