A uterine septum is a band of tissue that divides part of the uterus into two sections instead of one open space. It’s a condition you’re born with, not something that develops later in life. Many people never know they have one until they’re evaluated for a miscarriage or trouble getting pregnant.
This article explains how a uterine septum can affect pregnancy, how doctors find it, and when surgery to remove it is usually considered.
When to Seek Care Right Away
A uterine septum itself is not a medical emergency. But if you are pregnant, contact your obstetrician–gynecologist (ob-gyn) or go to urgent care right away if you have:
- Heavy vaginal bleeding that soaks through a pad in an hour or less
- Severe or worsening pelvic or abdominal pain
- Signs of pregnancy loss, such as cramping with bleeding
- Fever, chills, or foul-smelling discharge after any uterine procedure
These symptoms need prompt evaluation by a qualified clinician. This article does not replace that care.
How a Uterine Septum Forms
The uterus develops from two tubes that join together before birth. Normally, the wall between them dissolves, leaving one open space. When that wall doesn’t fully dissolve, the leftover tissue is called a septum. The septum can be small, reaching only partway into the uterus, or it can extend further toward the cervix.
A septum is made of fibrous tissue with a poor blood supply, which is part of why it can interfere with a pregnancy trying to implant or grow in that part of the uterus.
How Doctors Diagnose a Uterine Septum
A uterine septum usually doesn’t cause symptoms on its own, so it’s often found during testing for repeated miscarriages or infertility. According to the National Library of Medicine’s MedlinePlus, a hysteroscopy allows a clinician to directly view the inside of the uterus using a thin, lighted scope passed through the vagina and cervix. This lets a provider look for structural differences in the uterus and is also used to look into the cause of repeated miscarriages.
Other imaging tests, such as pelvic ultrasound or specialized imaging of the uterine cavity, are commonly used first to look at the shape of the uterus before a hysteroscopy is considered. Your ob-gyn or a reproductive specialist will recommend which tests make sense for your situation.
How a Uterine Septum Can Affect Pregnancy
The American College of Obstetricians and Gynecologists (ACOG) identifies congenital uterine conditions as one possible cause of repeated miscarriage, and points to a septate uterus — where a band of tissue splits part of the uterine cavity — as one of the more frequently identified causes among these structural conditions.
A septum can make it harder for a fertilized egg to implant well or for the pregnancy to get the blood supply it needs to grow, which is why it’s associated with a higher chance of early pregnancy loss. It’s important to know that many people with a uterine septum go on to have healthy pregnancies without any treatment, and a septum is just one of several possible reasons behind repeated miscarriage.
Uterine Septum vs. Other Uterine Shape Differences
A septate uterus is often confused with other congenital uterine shapes, but they are not the same and are managed differently. Only imaging or direct visualization by a trained clinician can tell them apart.
- Septate uterus: One outer uterus shape, with a band of tissue dividing the inside cavity.
- Bicornuate uterus: The uterus itself is shaped differently on the outside, with two connected sections.
- Arcuate uterus: A mild dip at the top of the uterine cavity, generally considered a normal variation.
Because these conditions look similar on some tests, an accurate diagnosis from an experienced provider matters before any treatment decision is made.
When Is Hysteroscopic Septum Resection Recommended?
Hysteroscopic septum resection is a surgical procedure that removes the septum tissue using instruments passed through a hysteroscope, so no external incision is needed. ACOG notes that surgically removing a septum is one of the corrective options doctors may consider to help improve the chances of a successful pregnancy after repeated loss.
In general, this surgery is most often discussed when someone has a history of miscarriage or difficulty conceiving that appears linked to the septum. It is a decision made together with your ob-gyn or a reproductive endocrinologist, based on your full reproductive history, not on the septum alone.
A Simple Decision Path to Talk Through With Your Doctor
- Step 1: Has a uterine septum been confirmed with imaging or hysteroscopy, and distinguished from a bicornuate or arcuate uterus?
- Step 2: Do you have a history of miscarriage, preterm birth, or difficulty conceiving?
- Step 3: Ask your provider what the evidence says about surgery for your specific situation, since guidance can differ depending on whether you’ve had a prior pregnancy loss.
- Step 4: Discuss the risks of the procedure itself, recovery expectations, and what happens if you choose not to have surgery.
- Step 5: Ask when it would be safe to try to conceive again after any procedure.
Evidence Limits and Extra-Caution Groups
Research on uterine septum and pregnancy outcomes comes mostly from observational studies rather than large randomized trials, so recommendations can vary between clinicians and professional societies. Whether surgery is recommended before you’ve ever tried to conceive, versus after a loss, is an area where medical opinions differ.
Extra care and specialist input are especially important if you:
- Have had two or more pregnancy losses
- Are undergoing fertility treatment, such as IVF
- Have another uterine condition, such as fibroids or scar tissue, in addition to a septum
- Have had a prior uterine surgery of any kind
Coping With Pregnancy Loss
If a uterine septum has been linked to a miscarriage you’ve experienced, ACOG’s guidance for patients emphasizes that grief after a pregnancy loss is a normal response, and reassures patients that a miscarriage is essentially never the result of something they did or failed to do. Talking with your ob-gyn or a therapist, and connecting with a support group, can help while you decide on next steps.
Frequently Asked Questions
Does every uterine septum need to be removed?
No. Many people with a uterine septum have no symptoms and never need surgery. The decision depends on your pregnancy history and reproductive goals, and should be made with your ob-gyn.
Can I get pregnant naturally with a uterine septum?
Yes, many people do. A septum raises the chance of certain pregnancy complications for some people, but it does not prevent pregnancy from happening.
Is hysteroscopic septum resection a major surgery?
It’s typically done through the vagina and cervix without external incisions, but it’s still a surgical procedure with its own risks. Ask your surgeon what to expect for your specific case.
How is a uterine septum different from a fibroid?
A septum is tissue you’re born with that divides the uterine cavity. A fibroid is a separate, noncancerous growth that can develop later in life. They are diagnosed and treated differently.
Related Reading
- Our Editorial Policy — how we verify claims and review articles like this one
- Medical Disclaimer — what this information can and can’t tell you
- About Reproductive Health Center
Educational Disclaimer
This article is for educational purposes only. It does not diagnose any condition, prescribe treatment, or replace care from a qualified healthcare provider. If you have symptoms, a suspected uterine anomaly, or questions about pregnancy loss, talk with your ob-gyn or a reproductive specialist.