Diagnosis
How do I prepare for pelvic imaging, and does cycle timing matter?
The short answer
For transvaginal ultrasound, we typically recommend an empty bladder; MRI preparation is usually minimal, but cycle timing can matter. Early to mid-cycle can help reduce confusion from normal hormone-related thickening that can mimic disease.
For a transvaginal ultrasound, we typically recommend coming in with an empty bladder because it can improve visualization and make the exam more comfortable. The scan itself is usually brief, and our team will walk you through what to expect when you check in.
MRI usually requires minimal preparation and can be scheduled at most points in the cycle, but timing can matter for interpretation. Early to mid-cycle can help reduce confusion from normal hormone-related thickening that can mimic disease on imaging. Many patients prefer to avoid days of heavy bleeding for comfort and image clarity. If you’re not sure when to book, reach out. Our team can help choose a time that fits your cycle and your symptoms.
Where to go from here
Understand it, compare it with what you're feeling, then talk it through with us.
Step 2 · Speak with Us
Get Ready for Clear Imaging
Our specialists guide you through simple prep like timing and bladder status to ensure the best pelvic imaging results. We help interpret your scans to move your diagnosis forward with clarity and care.
Questions people ask next
All diagnosis questionsHow do I prepare for an endometriosis ultrasound, and will it hurt?
Preparation depends on the ultrasound type; pressure and sometimes mild cramping should be tolerable. Transvaginal scans typically need an empty bladder, while abdominal scans may need a full bladder. A light bowel prep may be recommended if bowel involvement is a concern.
Do I need bowel prep for an endometriosis ultrasound?
Usually, no bowel prep is needed for a standard transvaginal ultrasound to evaluate suspected endometriosis. Bowel prep is more commonly discussed for specialized imaging of suspected bowel involvement or when the imaging team has a specific protocol.
When is pelvic MRI recommended for suspected endometriosis?
Pelvic MRI is most helpful when deep endometriosis is suspected and is commonly used when a high-quality ultrasound doesn’t fully explain symptoms. It can help plan surgery and may be considered if symptoms persist despite treatment and results could change next steps.
Standard pelvic ultrasound vs endometriosis-focused scan: what’s different?
A standard pelvic ultrasound surveys the uterus and ovaries, while an endometriosis-focused scan uses targeted imaging and checks how pelvic organs move against each other. A standard scan may miss deep disease or scarring; a focused scan can help with surgical planning.
Further reading
Diagnosing Adenomyosis: What to Expect from Tests and Imaging
Discover how adenomyosis might be diagnosed through imaging tests. Learn what to expect and understand your symptoms better.
Can Scans and Tests Find Endometriosis? Know the Limits
Discover why ultrasounds may miss endometriosis. Learn about imaging limits and recent research in our latest blog. Find clarity in your diagnosis.
Do You Need Two Ultrasounds Before Bowel Endometriosis Surgery?
How TVS (transvaginal) and ERUS (endorectal) map rectal endometriosis, guide bowel surgery planning, flag stenosis and risks, and who benefits.
