A hysteroscopy is a minimally invasive procedure that lets a doctor look directly inside your uterus using a thin, lighted camera called a hysteroscope. The scope passes through your vagina and cervix without any incisions, giving a real-time view of the uterine lining. Depending on what’s found, the doctor can diagnose problems, take a tissue sample, or treat certain conditions during the same visit.
How the Procedure Works
The hysteroscope is a slender tube with three main components: an eyepiece, a barrel, and a lens at the tip. It comes in rigid and flexible versions, and the one your doctor chooses depends on whether the goal is purely diagnostic or surgical. Once the scope is positioned inside the uterus, a liquid solution flows through it to gently expand the uterine cavity and clear away blood or mucus. This creates a clear view of the entire lining and the openings of both fallopian tubes.
The basic steps are straightforward. Your doctor performs a pelvic exam, then dilates (opens) the cervix just enough to slide the hysteroscope through. The camera sends images to a monitor so the doctor can inspect the cavity in detail. If something abnormal is found, small surgical instruments can be passed through a channel in the scope to remove or treat it right then.
Diagnostic vs. Operative Hysteroscopy
Hysteroscopy falls into two broad categories. A diagnostic hysteroscopy is purely for looking. It’s commonly used to investigate unexplained bleeding, repeated miscarriages, or abnormal findings on an ultrasound. It can also help locate a displaced IUD or evaluate the shape of the uterus before fertility treatment.
An operative hysteroscopy goes a step further. Instead of just viewing the problem, the doctor treats it during the same procedure. Common reasons include removing uterine polyps, cutting away fibroids that bulge into the uterine cavity, dividing scar tissue (adhesions), or resecting a uterine septum. The ability to diagnose and treat in one session is a major advantage over older approaches that required separate surgeries.
How Accurate Is It?
Hysteroscopy is considered the gold standard for evaluating the inside of the uterus because the doctor sees the tissue directly rather than interpreting an image. Studies comparing it to other methods show a sensitivity of about 98% and a specificity of 67% when measured against tissue biopsy results. That high sensitivity means it rarely misses a real problem, though some findings still need a biopsy to confirm exactly what they are.
What Anesthesia to Expect
The setting and type of anesthesia vary based on whether you’re having a simple look or a more involved surgical procedure. Many diagnostic hysteroscopies happen in an office with no anesthesia at all, or with a local numbing agent applied to the cervix. You may feel pressure and cramping, but the procedure often takes under 10 minutes.
Operative hysteroscopies, especially longer ones, are more commonly done in an outpatient surgical center with sedation or general anesthesia. Common sedation options work quickly and wear off fast, letting most people go home the same day. The American College of Obstetricians and Gynecologists notes that pain management for in-office uterine procedures is highly individual, so discussing your options and preferences with your doctor beforehand is worthwhile.
How to Prepare
Your doctor will typically schedule the procedure during the first half of your menstrual cycle, after your period ends but before ovulation. The uterine lining is thinnest at that point, which gives the clearest view and reduces the chance of disrupting an early pregnancy. If you’re having sedation or general anesthesia, you’ll likely need to fast for several hours before. For an office-based diagnostic procedure without sedation, fasting usually isn’t required.
You may be advised to take an over-the-counter pain reliever about an hour before arriving. Let your doctor know about any medications you take, particularly blood thinners, since these can affect bleeding during the procedure.
Recovery and What to Expect After
Recovery from a diagnostic hysteroscopy is quick. Most people return to normal activities the same day or the next. Mild cramping similar to period pain is common for a day or two, and light spotting or watery discharge can continue for a few days to a couple of weeks.
After an operative hysteroscopy, recovery takes a bit longer but is still measured in days rather than weeks. Cramping may be more noticeable, and spotting can last longer depending on what was removed. Your doctor will let you know when it’s safe to resume exercise, sexual activity, and tampon use, which is typically within a few days to two weeks.
Success Rates for Common Treatments
Hysteroscopic removal of uterine polyps has strong outcomes. A large review of over 1,000 patients found that 85% reported improved symptoms after polypectomy. The polyp recurrence rate was about 14%, with premenopausal patients accounting for most of those cases. The surgical technique matters too: removal with scissors showed a recurrence rate of roughly 10%, compared to about 18% when grasping instruments were used.
For submucosal fibroids (the type that protrude into the uterine cavity), hysteroscopic removal avoids the need for open surgery or hysterectomy in many cases. Success depends on the size, number, and depth of the fibroids, which your doctor can assess on imaging beforehand.
Risks and Complications
Hysteroscopy is one of the safer gynecologic procedures, but no procedure is without risk. The most commonly discussed complication is uterine perforation, where the scope or an instrument creates a small hole in the uterine wall. This is uncommon and usually heals on its own without further treatment.
Other possible complications include infection, heavy bleeding, and reactions to the fluid used to expand the uterus. If too much distending fluid is absorbed into the bloodstream, it can cause an electrolyte imbalance, though surgical teams monitor fluid levels closely to prevent this. Serious complications are rare overall, and the vast majority of hysteroscopies are completed without incident.