The ovaries sit behind and to the sides of the intestinal loops that fill the pelvis. Each ovary rests in a shallow depression on the lateral pelvic wall called the ovarian fossa, while segments of small intestine drape over and in front of them. That spatial relationship is the typical arrangement, but the reality is more dynamic than any anatomy diagram suggests, because both the ovaries and the intestines shift position with body posture, bladder fullness, and reproductive changes over a lifetime.
Where the Ovaries Actually Sit
Each ovary is about the size and shape of a large almond and occupies the ovarian fossa, also known as the fossa of Waldeyer, a small concavity on the inner surface of the lateral pelvic wall. The ovaries are suspended inside the pelvic peritoneal cavity by three anchoring structures: the mesovarium, which connects the ovary to the back surface of the broad ligament; the utero-ovarian ligament, which tethers it to the uterus; and the suspensory ligament, which anchors it to the pelvic sidewall.1European Society of Radiology. Non-Ovarian Pelvic Masses: Key Concepts and Useful Clues to the Radiologist – Section: Background Those three tethers keep the ovaries roughly in position but allow a surprising degree of movement.
The broad ligament is a wide sheet of tissue that hangs like a curtain across the pelvis, draping over the uterus and fallopian tubes. Because the mesovarium attaches the ovary to the posterior (back) surface of that curtain, the ovary naturally sits behind it. The small intestine, by contrast, tends to occupy the space in front of and above the broad ligament. The result is a layered arrangement: intestinal loops in front, the broad ligament as a partial divider, and the ovaries behind and lateral.
How Intestines and Ovaries Share the Pelvic Space
The pelvis is a surprisingly crowded space. The bladder sits at the front, the rectum and sigmoid colon at the back, the uterus in the middle, and loops of small intestine cascade down from the abdomen to fill whatever room remains. The ovaries occupy a niche on either side wall, tucked behind these more centrally located organs.
The small intestine is the most mobile organ in the abdomen, and its loops routinely slide into and out of the pelvic bowl depending on gravity, posture, and how full nearby organs are. When you’re upright, intestinal loops tend to settle deeper into the pelvis, draping over the uterus and sitting in front of the ovaries. When you’re lying flat, they shift upward and may vacate the pelvis almost entirely. Surgeons take advantage of this by tilting the operating table head-down during pelvic procedures, encouraging the bowel to slide out of the surgical field under its own weight.2Journal of Obstetrics and Gynaecology Research. Factors related to clearance of the small pelvic cavity during gynecologic laparoscopic surgery
The large intestine has a more fixed relationship with the ovaries. The sigmoid colon curves through the left side of the pelvis and can sit very close to the left ovary. The rectum descends along the midline behind the uterus. Neither of these segments is directly in front of the ovaries, but they’re close neighbors, separated by thin peritoneal folds and a small amount of fluid. On imaging, distinguishing an ovarian mass from a bowel loop sometimes requires careful technique precisely because these structures are packed so tightly together.
Why the Position Is Not Fixed
Anatomy textbooks show the ovaries in a tidy, symmetrical arrangement, but in living people the picture is messier. Several factors shift the ovaries from their “textbook” location.
- Bladder filling: A full bladder pushes the uterus backward and can displace the ovaries posteriorly and laterally. An empty bladder lets everything settle forward.
- Pregnancy history: After pregnancy, the uterus and its supporting ligaments are often laxer, and the ovaries may sit lower or more posteriorly than in someone who has never been pregnant.
- Menstrual cycle: During ovulation, the dominant follicle enlarges the ovary on one side, sometimes enough to change its relationship to nearby bowel.
- Age: After menopause, the ovaries shrink considerably, and the ligaments that hold them lose tension. The ovaries can become difficult to identify on imaging because they’re smaller and may be surrounded by or pressed against intestinal loops.
- Body habitus: In people with more abdominal fat, the bowel tends to be pushed deeper into the pelvis, increasing the amount of intestine sitting in front of the ovaries.
Because of all this variability, a radiologist performing an ultrasound may find the ovaries in slightly different spots from one visit to the next, and the spatial relationship with surrounding bowel changes accordingly. The ovaries are generally behind the small bowel, but “generally” is doing real work in that sentence.
What This Means for Imaging
The close quarters between ovaries and intestines create a practical challenge: bowel loops can obscure the ovaries on imaging, and ovarian masses can mimic intestinal pathology or vice versa. Transvaginal ultrasound partly solves this problem because the probe is placed close to the pelvic organs, allowing high-resolution views of the ovaries, nearby gut, and the peritoneum lining the pelvic walls without interference from bowel gas or overlying fat.3PubMed. Nongynecologic applications of transvaginal US
On a standard abdominal ultrasound performed through the belly wall, the small intestine often sits between the probe and the ovaries, scattering the sound waves and degrading the image. Gas inside the bowel is especially problematic because it reflects ultrasound almost completely. The transvaginal approach bypasses all of that intestinal interference by entering the pelvis from below, behind the bladder, and getting within centimeters of the ovaries.
CT and MRI have an easier time distinguishing ovaries from bowel because they image in cross-section and can use contrast agents to light up the intestinal lumen. Even so, a collapsed loop of small intestine sitting right against an ovary can look worryingly like an ovarian mass on a single slice. Radiologists routinely scroll through sequential images and check whether a suspicious structure connects to the rest of the bowel before raising an alarm.
When Adhesions Rearrange the Normal Layout
The tidy spatial relationship between ovaries and intestines breaks down when scar tissue, called adhesions, forms in the pelvis. Adhesions are bands of fibrous tissue that can glue organs together after surgery, infection, or inflammation. Endometriosis is one of the most common causes in reproductive-age women, and the ovaries and the spaces immediately around them are frequent targets.
In one study of women with endometriosis-related infertility, roughly half of the adhesions found at surgery were in the adnexal area, meaning the ovaries and fallopian tubes.4PubMed Central. Impact of Endometriosis-Related Adhesions on Quality of Life among Infertile Women The ovaries, Douglas’ pouch (the space behind the uterus), and the uterosacral ligaments were the most commonly affected sites. When adhesions form between the ovary and nearby intestine, the ovary can become stuck to the bowel wall, the pelvic sidewall, or the back of the uterus, losing its normal mobility and landing in an abnormal position.
In severe cases, adhesions can create what surgeons call a “frozen pelvis,” where the uterus, ovaries, fallopian tubes, and rectum are all bound together in a single mass of scar tissue. In that scenario, asking whether the ovaries are in front of or behind the intestines becomes meaningless because the two are effectively fused. Surgeons working in a frozen pelvis have to carefully dissect tissue planes to figure out where one organ ends and the next begins, a process that carries risk of bowel injury precisely because the normal separation has been erased.
Why Surgeons Care About Bowel in the Pelvis
During laparoscopic gynecological surgery, one of the first practical challenges is getting intestinal loops out of the way so the surgeon can see and reach the ovaries. The standard technique is placing the patient in a steep head-down tilt, called the Trendelenburg position, which lets gravity pull the small bowel up toward the diaphragm and out of the pelvis.
Research on this topic found that when the small intestine did not clear out of the pelvic cavity during surgery, the required tilt angle was significantly steeper, and ovarian adhesions were more than twice as common in that group.2Journal of Obstetrics and Gynaecology Research. Factors related to clearance of the small pelvic cavity during gynecologic laparoscopic surgery The connection makes intuitive sense: adhesions tether the bowel in place so it can’t slide away with gravity, and the same inflammatory process that caused those adhesions probably also stuck the ovaries to their surroundings. For surgeons, persistent bowel in the pelvis during a laparoscopy is both an obstacle and a warning sign that the tissue planes may be abnormal.
This is also why pre-surgical bowel preparation, while less universally required than it once was, still matters for complex pelvic cases. A distended, stool-filled colon takes up more room, pushes the small intestine further into the pelvis, and makes it harder for the Trendelenburg position to work. A relatively empty bowel gives the surgeon a better chance of clearing the operative field and visualizing the ovaries without obstruction.
Ovarian Transposition and Deliberately Changing Position
There is one situation where the ovaries are intentionally moved far from their normal pelvic home: ovarian transposition before pelvic radiation therapy. When a younger patient needs radiation aimed at the pelvis for cervical cancer or another malignancy, the radiation field would normally include the ovaries and destroy their function. To preserve fertility and hormone production, surgeons can detach the ovaries from their ligaments and relocate them outside the radiation zone, usually clipping them to the abdominal wall above the pelvis.
A study examining where transposed ovaries actually end up found that most were positioned above the sacral promontory (the bony landmark at the top of the sacrum), with the majority sitting below the iliac crest but outside the radiation target area.5PubMed Central. Ovarian Transposition Before Pelvic Radiation Therapy: Spatial Distribution and Dose Volume Analysis In that relocated position, the ovaries are no longer behind the intestines at all. They’re sitting in the lower abdomen among the intestinal loops, clipped to the peritoneal wall, in a completely different spatial relationship than they would normally have. If radiation therapy is eventually no longer needed, the ovaries can sometimes be returned to the pelvis, though they don’t always regain their original position perfectly.
Ovarian transposition is a useful reminder that the ovary’s “normal” location is as much a product of its ligamentous attachments as it is of any inherent need to be in a particular spot. Detach those tethers and the ovary can live just about anywhere in the abdominal cavity and still function, at least for a while.
Common Points of Confusion
People often picture the pelvic organs as stacked neatly in a column, like floors in a building: bladder on top, uterus in the middle, rectum at the bottom, with the ovaries slotted in somewhere. The actual arrangement is more like a bowl filled with loosely packed organs. The uterus sits in the center, tipped forward over the bladder. The ovaries hang off to the sides and slightly behind. The rectum descends along the back wall. And small intestine fills whatever space is left, which means it’s often draped over and in front of everything else.
Another common confusion involves the term “behind.” In anatomical language, “behind” (posterior) means closer to the back of the body, not deeper inside or lower down. When we say the ovaries are behind the intestines, we mean they’re closer to your spine than the bowel loops that sit in front of them. They’re not underneath the intestines, although the intestines do sometimes drape over the top of them as well. The distinction matters because pain referred from the ovaries can feel like back pain or deep pelvic pain rather than the frontal abdominal pain people associate with intestinal problems. Clinicians sorting out whether pain is coming from the bowel or the ovary often rely on the location of tenderness, since the two structures sit in slightly different planes within the pelvis.
It’s also worth noting that “the intestines” is a broad term. The small intestine, which has a total length of several meters and is very mobile, is the portion that most often sits in front of the ovaries. The large intestine is less mobile, and its pelvic segments, the sigmoid colon and rectum, sit more medially and posteriorly. The left ovary, being closer to the sigmoid colon, has a slightly different neighborhood than the right ovary, which is closer to the appendix and the terminal ileum. That asymmetry occasionally matters in diagnosis: right-sided ovarian pain can mimic appendicitis, while left-sided ovarian pain can mimic sigmoid diverticulitis, precisely because these structures are near neighbors.
How Referred Pain Crosses Anatomical Boundaries
Because the ovaries and the intestines share the same general nerve supply from the pelvic and lower abdominal nerve plexuses, pain signals from one can feel indistinguishable from pain signals from the other. A ruptured ovarian cyst can produce sudden, sharp lower abdominal pain that mimics a bowel obstruction or even a perforated appendix. Conversely, gas distending a loop of small intestine pressed against the ovary can feel like ovarian pain.
This overlap is a direct consequence of the ovaries sitting so close to the intestines within the confined pelvic space. The proximity means that inflammation in one organ can irritate the surface of the neighboring organ. A swollen, inflamed ovary can cause localized irritation of the bowel serosa (outer lining) draped over it, producing nausea or changes in bowel habit that seem to have nothing to do with the reproductive system. In the emergency department, distinguishing between gynecological and gastrointestinal causes of acute pelvic pain often requires imaging for exactly this reason: the symptoms alone are unreliable because the anatomy puts these organs in such close contact.
Endometriosis makes this diagnostic puzzle even harder. When endometrial tissue implants on the bowel wall or in the space between the rectum and the uterus, patients can develop cyclical bowel symptoms, including pain with bowel movements, bloating, and diarrhea, that follow the menstrual cycle. The implants are physically bridging the gap between the reproductive and intestinal organs, turning an anatomical proximity into a functional overlap. Clinicians who specialize in endometriosis expect bowel symptoms and screen for them, but in general practice, cyclical bowel complaints are sometimes attributed to irritable bowel syndrome for years before the pelvic origin is recognized.