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Diagnosis: Uterine Anomalies

Uterine Anomalies
by TeamWinks and Serenity

What a Uterine Anomaly Means and Its Impact on Fertility

A uterine anomaly is a form of congenital birth defect – in that the uterus forms when the fetus is inside her mother’s womb.

About ten weeks after conception, the uterus is comprised of a pair of structures called mullerianducts. The top of the ducts (i.e. the ones closest to the embryo’s head) will become the fallopian tubes – they remain separated throughout development.The bottom of the mullerian ducts, however, begin to fuse together to become one structure that will become the uterus. At stage one of this fusion, they have formed a central wall, or “median septum” in the middle of the fused tube. This structure, when first formed, is a cylindrical structure of equal diameter.

Between ten and thirteen weeks, the central wall of this tube begins to expand at the top to form the uterus fundus. At the bottom of the uterus, this central wall, or median septum also begins to dissolve; leaving a continuous chamber that will become the uterine cavity.Between weeks thirteen and twenty, the median septum should dissolve completely from the bottom to the top of the uterus, resulting in a single, continuous uterine cavity.

Uterine anomalies result from the following:

  • failure of one of the two mullerian ducts to form (unicornuate),
  • failure of the two ducts to fuse completely (bicornuate), or
  • failure of the two fused mullerian ducts to dissolve the median septum (septate).

Diagnostic Process

Some uterine abnormalities can be diagnosed with a simple ultrasound – a bicornuate uterus, for example, sometimes clearly shows two uterine cavities (or “horns.”) However, once a uterine abnormality is identified, it does take some work to fully diagnose it. The best method of diagnosis is generally a hysteroscopy and/or laparoscopy, but that requires the use of generalanesthesia and is generally more expensive.

A HSG & Saline Infusion Ultrasound, where they fill your uterine cavity with fluid/dye can give your RE a good idea of what type of abnormality exists. Your RE may want to perform a MRI, CT scan, and/or 3D ultrasound as well.

Treatment Options and Prognosis

Treatment of a uterine abnormality is entirely dependent on which type of diagnosis you receive and your RE. Generally, however, a septate uterus will present fertility issues in that the septum has no blood flow and will sometimes interfere with the implantation process. In that case, a hysteroscopy and laparoscopy will be recommended, where your RE will surgically remove the septum. Depending on its size, you may need multiple procedures. Unicornuate and bicornuate uterus diagnoses will often not be treated at all, since with both types there tends to be a normal blood flow to the uterus. However, there is an increased chance of preterm labor – since the uterus doesn’t stretch like a “normal” uterus would. Thus, when a woman with this type of anomaly becomes pregnant, some doctors classify them as high risk.

Personal Experience

TeamWinks’s perspective

Once you learn that you have a uterine anomaly, you can expect a whole lot of confusion. It is often very difficult to pin down exactly what your uterus looks like. Reproductive outcomes for women with these anomalies aren’t all that reassuring, and it certainly doesn’t help that there is a lack of literature out there to educate yourself. Be prepared to primarily read literature that was prepared for other doctors and not the average woman. They are often dense articles, and take time to work through. There is a wonderful support group on yahoo that does help (http://health.groups.yahoo.com/group/MullerianAnomalies/)

I am not sure whether I have a bicornuate uterus or a unicornuate uterus. My RE has been unable to pin this one down. Soon we should know for sure. I would say on a good day that having this birth defect can be difficult. Often women with a uterine anomaly have only one kidney. Thankfully I have two. They also have high incidences of PCOS, endometriosis, insulin resistance, high miscarriage rates, and pre-term labor. That’s a strong cocktail thrown at you at once. I truly believe you need a support system from the moment the diagnosis is handed to you. It’s important to remember that it isn’t a death sentence. However, it is important to ask as many questions as you can.

Serenity’s perspective

My RE thinks that I have a true bicornuate uterus, which was diagnosed last year after my hysteroscopy. But given our recent IVF failures and that we believe it might be implantation related, we are revisiting this at the end of the month, however, with a 3D ultrasound to ensure that he didn’t miss a septum earlier. The biggest thing to remember: the statistics and risks they throw at you when you’re diagnosed are often skewed. There are a lot of women who a have bicornuate/unicornuate uterus who have never been diagnosed; they have gone on to get pregnant and have perfectly normal pregnancies and healthy babies. My OB and my RE told me that having a bicornuate uterus was probably the “best” one to have, practically speaking, since I have good endometrial lining in both horns. They have also told me that the bulk of women who have this to go on and bear very healthy, normal children. So my advice would be to take the risks you’ll read about with a grain of salt.

Links for uterine anomaly research:



Images of Uterine Anomalies

In addition, Preventing Miscarriage by Jonathan Scher has some information about uterine anomalies and their role in miscarriage.


1 Anonymous { 11.20.08 at 11:19 pm }

This information was very helpful and hopeful to me as my daughter has recently been diagnosed with bicornuate uterine anomaly. Further testing is being done to decipher the extent of this situation. Thank you for your site. I have not heard of this congenital abnormality before.

2 Anonymous { 11.21.08 at 12:24 pm }

I found out in college that I had a vaginal septum, and resulting two cervices, when I went to the Gynocologist for the first time. It was very unsettling. SInce then I have gotten used to being a lab specimin for residents and newly minted doctors. I got used to reminding the nurses on my annual visits that I would need two PAP smears.

I was told initially that it would be difficult to become pregnant, that I would be suseptible to miscarriange and may not be able to carry a baby to term.

After a long duration of not seeking to get pregnant (long story), my DH and I wanted to find out if it was possible. I had this anomoly and that I was pushing the age limit (just over 40). My RE decided it was time to find out exactly what was going on under the hood and I had a lap/hysteroscopy. They removed the vaginal septum during the procedure, but what they didn’t expect to find was that I had a uterine septum too. The RE did not remove it at that time because he didn’t have my permission to so so. He intimated that if I were 24, he’d recommend that I have surgery in the future to remove it. But since my time is limited, he recommended to try my luck with it.

3 Anonymous { 02.06.09 at 2:09 pm }

This is the second poster again, the one who found out recently about a uterine septum during a lap/hysteroscopy.

As a follow-up, I just wanted to let those who may have this condition that chances tog et pregnant aren’t completely dire. In December 2008, I took my first round of clomid and found out on New Years Eve 2008 that I was pregnant. I am due in September 2009.

4 Anonymous { 05.17.09 at 2:57 pm }

Please don’t give up ladies, I to was diagnosed with a bicornuate uterus back in 1985, after surgery,3 months later I was allowed to start back with my clomid, (150mg)I got pregnant and carried 38 weeks and had a scheduled c-section giving birth to a healthy 6 lb 9 oz baby boy, followed 20 months later with another 38 weeker, a 7 lb 2 oz baby girl, the trick is finding a good Dr who knows what they are doing, it is not a hopeless diagnosis, please keep the faith 🙂

5 cowboyboot lady { 05.18.09 at 12:25 pm }

I was diagnosed with uterus didelphys and septum (two uterus and two cervix) over a year ago. I am 31 years old next month. Doctors told me that I should be able to conceive and carry baby, but at high risk for preterm labor. I hope to marry in the near future and give it a go! I am documenting my journey on my new blog. I am both excited and nervous about my reproductive future!

6 Catherine { 08.20.09 at 8:40 am }

I am 54yo .. about to turn 55 and have a bicornate uteri fully divided and both fully functional. well were until I hit menopause.

my DD was carried in the right urerus.. and my DS in the left (funny note: she is right handed he is left handed..LOL) both were 4 weeks early.. beautiful and healthy..

I am now awaiting hysterectomy because I have a thickened endometrial lining (13mm) and because of my anatomy.. {{grin}} they can not biopsy it. apparently little swimmers can go up.. but nothing else.. and blood can come down but nothing else.
So I am told, it was a good thing I had both babies C-sections.

to all who have such.. it can be fun.. and funny.. but do take good care post menopause. it can be a problem too.

7 Betony { 03.11.10 at 12:22 am }

I am 28 & have a bicornate uterus. I had no trouble conceiving or carrying my daughter to term. During birthmy vaginal septum tore and was removed 8 weeks post partum. With this small exception, my pregnancy was normal, enjoyable & not at all high risk! It was not expected that I’d carry full term, but I did. I’d say each case is different! I am happy to report we plan a home birth with our future pregnancy.

8 Stacey { 05.07.10 at 8:31 pm }

I am a 33 year old with a Right Unicornuate Uterus, one tube, both ovaries (one free floating up in my ribs LOL). I have 3 beautiful healthy children, all of which were LATE 🙂 I did not know of my condition until after I had given birth to my 2 boys. We experienced secondary infertility trying for our third child and that is when an HSG uncovered my one lonely horn 🙂
My husband and I decided we would finish out that month of trying and if it did not “happen” we would thank God for the 2 healthy children we had and consider our family complete. But 9 months (and 10 days) later we had our daughter!
I am thankful I had healthy normal pregnancies and also glad I was not aware of my anomaly prior to having my first 2 babies. It is a frightening diagnosis. I want to share my story with anyone who may benefit from knowing a “success” story. Don’t give up.

9 Bionic Baby Mama { 06.09.10 at 3:33 pm }

I have a vaginal septum and two cervices but a single, normal uterus. I’m posting this here because the system of classifying Mullerian anomalies doesn’t include people like me, so plenty of doctors don’t think we exist.

If you have exterior Mullerian anomalies — vaginal septum, double cervix, septate cervix — it is of course important to get your uterus checked out, but don’t assume it can’t be normal. I was very upset while waiting for my MRI results, and very confused when they said my uterus was okay. I got a second opinion on the films (and an HSG) before I would believe it.

If anyone out there wants to talk, feel free to email me via my blog.

10 Janis { 10.03.10 at 9:58 pm }

Way back in 1991 at just 6 weeks pregnant with my first baby my Dr. suspected that I may only have 1/2 a uterus. My uterus was only enlarging on the right side. At that time he said there was no test that would be able to tell us whether or not I did. He did put me on bed rest from 30 to 37 weeks. At 1 am on my daughter’s due date I woke up in labor. I did end up with a cesarean due to lack of progression, and that is when we saw that I did indeed have a unicornuate uterus. My c-section went perfectly and I brought home a beautiful, healthy, baby girl. Two years later I did the same thing. Only this time my son was breach which they say can happen with a uterine anomaly like I have. Two years after that I brought home another beautiful baby girl, but my water did break the day I got off of bed rest. I just want everyone to know if you do have this type of anomaly you CAN bring home a healthy baby. I did it 3 times with just bed rest. If anyone out there needs some encouragement feel free to email me. nakutin5@ca.rr.com

11 Laura { 07.26.13 at 9:04 pm }

Just some more hope to offer those who have been determined to have these anomalies…my doc had a hunch that I had a bicornuate uterus and one kidney well into my first pregnancy. I delivered naturally and carried with no problems. After that, we did testing to confirm and she was right.

Four years later, I had trouble conceiving. Looking back I am convinced it was my husband’s high stress job. I had spotty bleeding early on and my doc found it was coming through the other side (the one without a baby in it). We were in a foreign country at the time, so the only way she could easily put it into English was by saying the other side “was jealous” that it didn’t have a baby in it. I carried and delivered naturally and comfortably with no complications.

Now that I feel my famiy is complete, I watch my kidney by having some extra tests each year and was cautioned by my doc never to offer a kidney to anyone 😉

So, just wanted to offer my story of having children in case you are fearful. It is possible and as others have mentioned, many people have this anomaly and don’t even know it because there aren’t a lot of problems associated with it.

12 Sue { 08.14.13 at 4:01 am }

Just wanted to say thank you all esp. Catherine, Betony and Laura who have the same condition as me and had successful pregnancies and have now healthy babies. Thank you so much for your encouraging stories!

13 TamB { 12.13.13 at 7:59 am }

I just found out (12/11/13) that only 1/2 my utersus formed.when my Dr said that my heart broke, (all I ever wanted was to be a mom.) I blocked out whatever else my Dr said at that point. I’m not ready to give up, so can I still get pregnant, what are my options, and what are the risks.

14 Tabatha { 05.08.14 at 3:22 pm }

Very interesting stories. I have a true bicornuate uterus with a septum that runs the full length of my uterus through my vagina. I also have two cervix. I found out at 17 by an old school md who said ” well it may work but it may not ” I became an RN and specialized in labor / delivery for many years. We got pregnant one month after stopping birth control due to my intolerance of it. I carried her on the right side with many preterm labor scares that lead to early treatment with steroids to get her lungs mature. Delivered her at 35 weeks via csection with no issues. We had a miscarriage three years later of a planned pregnancy. We then opted to not try anymore and be happy with one child. I could not tolerate any type of birth control so after 5 years of trying many options , we decided my husband would have a vasectomy. One month before he was scheduled , we found out I was pregnant. Even more suprising was the ultrasound because we were pregnant in both sides. I almost lost it. It was straight to bedrest at 20 weeks and weekly visits with my team of specialists. We delivered a healthy boy and girl at 34 1/2 weeks via csection followed by tubal ligation. It was truly a miracle. I have had multiple issues with endometriosis and other complications over the years so I had a partial hysterectomy last year and I have never felt better.

15 Jennifer { 04.15.15 at 6:12 am }

Want to share that i as well have a bicornuate uterus. My right horn is very small compared to my left horn. I also have 2 cervix.

I have carried two full term pregnancies both in my left horn. Both pregancies i had a cerclage of my cervix, which was removed 2 weeks before my due date. With my first pregnancy i was on bed rest the entire time, my second i was not, as my uterus was stretched and more roomy after my first, and my doctor was able to do my cerclage within the first month.

I have two very healthy children – a 13 year old son, and a 3 year old daughter. My best advice for anyone in this situation is to remain positive, listen to your body and take good care of yourself. Best wishes XO

16 Gillian Stapleton { 06.06.16 at 9:15 am }

I was only diagnosed with Mullerian abnormalities and endometriosis when the histology from my total hysterectomy came back. I was frequently told by doctors throughout my teens, 20s and 30s that I was imagining or exaggerating pains and symptoms, and that I should stop wasting their valuable time. Now in my 50s, childless, and with an ex-husband who found a younger and fertile wife as he was sick of me being ‘ill’, it’s probably a little late to tell the medical professionals ‘I told you so’. My apologies if that sounds bitter, but by God it is a hard pill to force down. Gillian

17 Karen Cathcart { 11.27.16 at 1:09 am }

Two of my daughters and I carry the gene for this anomaly. One of them is an identical twin & her twin did not have the problem. I have 3 breasts and a heart shaped uterus. I also have a double ureter off my right kidney & a normal left kidney. I never displayed prperly during my pregnancies & delivered very large babies. Both daughters have two uteruses and two vaginal openings. One was born with three kidneys & many other urinary tract complications. We just found out that the twin with two uteruses has a rare polycystic kidney disease & I also now have cysts on my kidneys & liver. Does anyone else have this too?

(c) 2006 Melissa S. Ford
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