From the outside, having two vaginas usually looks like nothing unusual. The vulva and labia are typically normal. The difference is inside, where a lengthwise wall of tissue divides the canal into two passages side by side.1Nationwide Children’s Hospital. Uterine Didelphys It starts before birth, when two tubes that normally merge into one reproductive tract stay partly or fully separate.2ABC News. Born With Two Vaginas: Not So Rare Many people have it for years without knowing, and many live with it without major problems.3PubMed Central. Unintentional Diagnosis of Uterus Didelphys in a Primigravida During Emergency Cesarean Section: A Case Report
What a Double Vagina Looks Like Inside
The dividing wall is the defining feature. Its medical name is a longitudinal vaginal septum, which simply means a lengthwise partition of skin-like tissue.4PubMed. Longitudinal vaginal septum: a proposed classification and surgical management If the wall runs all the way down, you may see a narrow band of tissue down the middle of the opening, or two separate openings. If it stops partway, the opening looks normal and the split can only be felt or seen further inside.5PubMed. Longitudinal vaginal septum: a proposed classification and surgical management The wall can also sit in the middle or off to one side, so one passage may be noticeably larger than the other.6PubMed. Longitudinal vaginal septum: a proposed classification and surgical management
With a mirror or your fingers, a complete wall can show up as a vertical band just inside the opening. A partial wall is more often felt as a ridge deeper in. One side may feel tighter or shorter than the other. The outer labia, clitoris and urethra are normally unaffected.
An off-center wall also explains why many people never suspect a second passage. If the wall sits off-center, one side may be wide enough for a finger or tampon while the other is narrow. A narrow side can feel like a tight band or a blind-ended pocket rather than a full canal, so it is easy to mistake for ordinary tissue.
The wall is soft, flexible tissue much like the vaginal lining, not bone or anything hard. In some people it stretches and moves during sex or tampon use, so the anatomy can feel different from one day to the next. Because it has a blood supply, it can bleed a little if it is scraped or torn.
Doctors describe the wall by whether it runs the full length, whether it is centered, whether it connects to the cervix, and whether either opening is narrow.7PubMed. Longitudinal vaginal septum: a proposed classification and surgical management There are more than 10 variations of how the two tubes fail to merge,8ABC News. Born With Two Vaginas: Not So Rare so two people told they have two vaginas may have quite different-looking anatomy.
Why It Happens and What Else Is Often Doubled
In a female fetus, two small tubes normally join to form one uterus, one cervix and one vagina.9Nationwide Children’s Hospital. Uterine Didelphys If they don’t join completely, each can develop into its own uterus.10Nationwide Children’s Hospital. Uterine Didelphys A double uterus, called uterus didelphys, often comes with two cervixes.11PubMed Central. Asynchronous twin delivery in uterus didelphys with a 12-week interval: case report and literature review Some people with it also have the vaginal wall, while others have only one vagina.12PubMed Central. Unintentional Diagnosis of Uterus Didelphys in a Primigravida During Emergency Cesarean Section: A Case Report Why the tubes don’t fuse is unknown.13ABC News. Born With Two Vaginas: Not So Rare
The timing explains the variety. The two tubes normally fuse from the middle outward, and then the central wall between them dissolves. The vaginal wall is a leftover of that second step. Fusion of the upper part and clearing of the lower wall are separate steps, which is why a person can have one without the other.
So the vaginal wall can exist with one uterus or two, and each passage may lead to its own cervix. Only a scan can say which. A person can also have two uteruses with a single open vagina, so the outside view is not a reliable guide to what lies above. Doctors map the whole tract, because knowing which parts are doubled matters for periods, contraception and pregnancy. About 1 in 4 people with a double uterus are missing a kidney,14Journal of Pediatric Surgery Case Reports. Uterine didelphys with concomitant renal anomalies in both mother and fetus so doctors usually check the kidneys once the anomaly is found.
Uterine shape differences of all kinds affect roughly 0.5 to 5% of people.15PubMed Central. Didelphys Uterus: A Case Report and Review of the Literature A partly divided (septate) uterus is the most common, at about 35% of these differences.16PubMed Central. Didelphys Uterus: A Case Report and Review of the Literature
Signs That Lead People to Find Out
The most common first clue is a tampon that doesn’t seem to work. Period blood still exits normally, but a tampon in one passage leaves the other side to keep bleeding.17Intimate Wellness Institute. Vaginal Septum It is frequently noticed in the teen years.
The pattern repeats every period no matter the brand or absorbency. Some people also notice that a tampon feels in the way or strangely angled, because it is pressed against the wall.
Unlike an ordinary leak, which usually comes when a tampon is full or sits too low, a leak from a second passage happens even soon after inserting a fresh tampon. Putting a second tampon into the other passage, or adding a pad, stops it, but that only manages the problem and does not confirm the cause. A doctor’s exam can do that quickly.
Other people find out in other ways. Some notice discomfort during sex, sometimes only occasionally.18PubMed Central. Uterus didelphys with double vagina diagnosed during third cesarean section: A case report Some first learn about it during pregnancy or even during a cesarean.19PubMed Central. Unintentional Diagnosis of Uterus Didelphys in a Primigravida During Emergency Cesarean Section: A Case Report In one case, a double uterus and double vagina were first found during a woman’s third cesarean.20PubMed Central. Uterus didelphys with double vagina diagnosed during third cesarean section: A case report
If you suspect it, see a gynecologist and describe the tampon or sex symptoms. Expect a gentle visual exam. Mention any kidney problems or pelvic pain, since they can be part of the picture.
When One Side Is Blocked
In a rare pattern called OHVIRA, or Herlyn-Werner-Wunderlich syndrome, a double uterus comes with one vagina sealed off.21PubMed Central. Herlyn-Werner-Wunderlich syndrome also known as obstructed hemivagina and ipsilateral renal anomaly: A case report and a comprehensive review of literature Blood from that uterus has nowhere to go and collects, forming a pelvic mass.22PubMed Central. Herlyn-Werner-Wunderlich syndrome (uterus didelphys, blind hemivagina and ipsilateral renal agenesis) – a case report This pattern usually comes with a missing kidney on the same side.23PubMed Central. Herlyn-Werner-Wunderlich syndrome also known as obstructed hemivagina and ipsilateral renal anomaly: A case report and a comprehensive review of literature
In real life, periods can look normal for a long time because the open side drains. Pain tends to start soon after periods begin in the teen years, and it builds each cycle as the sealed side fills. It often sits low on one side of the belly, matching the blocked uterus. As blood collects, it can form a swelling that a person or doctor can feel low in the belly. Some people have a steady, foul or brownish discharge between periods if a blocked side leaks a little through a small opening. Ultrasound and then MRI usually confirm it.24PubMed Central. Uterus Didelphys with Obstructed Right Hemivagina, Ipsilateral Renal Agenesis and Right Pyocolpos: A Case Report
Infection can cause fever, worse pain and unusual discharge. Fever with pelvic pain or a tender lump calls for urgent care. Pain that gets worse month after month, especially in a teen with normal-looking periods, deserves a prompt visit rather than waiting it out. The condition is treatable, and once the blocked side is opened, the pain usually resolves.
How Doctors Confirm It
A 3D ultrasound through the vagina is very good at identifying a double uterus, rarely labelling another shape as one.25Elsevier / European Journal of Obstetrics & Gynecology and Reproductive Biology. Three-dimensional transvaginal ultrasound versus MRI in the diagnosis and classification of congenital uterine anomalies: A systematic review and meta-analysis MRI is also used, especially to see blockages and kidneys.26PubMed Central. Herlyn-Werner-Wunderlich syndrome (uterus didelphys, blind hemivagina and ipsilateral renal agenesis) – a case report
In the exam room, the doctor may place a speculum and look carefully for a second cervix, sometimes using a smaller speculum in each passage. An ultrasound may be done on the belly or with a slim probe in the vagina, and the internal one gives a clearer picture of the uterus. MRI means lying still in a tube for a while and hearing loud knocking, but it involves no radiation and no pain. A kidney scan may be added.
It helps to leave with answers to a few questions:
- Is the wall complete or partial?
- Are there two cervixes and two uteruses?
- Is either side blocked?
- Are both kidneys present?
Sex, Periods and Removing the Wall
Many people choose not to have surgery when symptoms are mild.27PubMed Central. Uterus didelphys with double vagina diagnosed during third cesarean section: A case report A partner may notice the wall, but sex is often possible in either passage.
Surgery is worth considering when the wall causes painful sex, repeated tampon leaks or period pain, because those are the problems it can fix. It may also come up before a pregnancy if a vaginal birth is hoped for, since a wall can get in the way of delivery. A person without symptoms can reasonably leave it alone, and the choice stays theirs unless a side is blocked, which needs treatment regardless.
Surgeons can cut out the wall in a short procedure through the vagina, so there is no cut on the belly.28PubMed. Evaluation and Resection of a Longitudinal Vaginal Septum in an Adult Because the wall sits close to the bladder and bowel, surgeons take care to avoid them,29PubMed. Evaluation and Resection of a Longitudinal Vaginal Septum in an Adult which is why an experienced gynecologic surgeon matters. Newer stapler techniques avoid heat damage to nearby tissue.30PubMed. Resection of Longitudinal Vaginal Septum Using a Surgical Stapler Recovery is usually short, with a period of rest and a break from sex and tampons while tissue heals. In a group of 19 patients with pain, removing the wall and septum reduced painful sex and period pain.31PubMed. Treatment of twenty-two patients with complete uterine and vaginal septum
Pregnancy With Two Vaginas and Two Uteruses
Many women with a double uterus have healthy pregnancies, including several in a row.32PubMed Central. Three successful pregnancies in a patient with uterine didelphys: A case report Still, they are about 4 times as likely to deliver early.33American Journal of Obstetrics and Gynecology. Pregnancy outcomes among women with uterus didelphys Estimates of early birth range from about 1 in 6 to 1 in 3.34PubMed Central. The Impact of Uterus Didelphys on Fertility and Pregnancy The baby is about 9 times as likely to be in an awkward position such as breech,35American Journal of Obstetrics and Gynecology. Pregnancy outcomes among women with uterus didelphys so cesarean is about 8 times more likely.36American Journal of Obstetrics and Gynecology. Pregnancy outcomes among women with uterus didelphys Waters breaking early and stillbirth are also more common.37American Journal of Obstetrics and Gynecology. Pregnancy outcomes among women with uterus didelphys
Some doctors choose cesarean even when the baby is head-down, to avoid trouble with the narrow passage.38PubMed. Delivery of double singleton pregnancies in a woman with a double uterus, double cervix, and complete septate vagina With close specialist care, many pregnancies reach term.39PubMed Central. Didelphys Uterus: A Case Report and Review of the Literature
Planning helps. Tell the obstetrician about the anatomy as early as possible so care can be set up from the start. Expect extra scans to check growth and the baby’s position. Ask what signs of early labor to watch for, and who to call if they appear. If a wall is present, ask whether removing it beforehand makes sense for the planned birth.
Contraception takes some thought too. An IUD sits in one uterus, so with two uteruses it may protect only one side, and a clinician must check placement carefully. Pills, implants or injections work through hormones in the whole body, so they avoid the question of which uterus is covered. Condoms also work regardless of the anatomy.