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How likely is it that a woman with this condition would get pregnant with twins—one baby growing in each uterus? About one in 25, women with uterus didelphys gets pregnant with twins , one to each uterus. Most women aren't even aware they have the condition until they become pregnant and get an ultrasound exam, a test that uses sound waves to produce images of the inside of the body. If she gets an ultrasound about eight weeks into her pregnancy as most ob—gyns recommend , chances are the ultrasound technician would spot the extra womb.

But if the woman doesn't get an ultrasound until 20 weeks or more into her pregnancy, the uterus housing the fetus might have grown big enough to overshadow the extra uterus in which case the ultrasound technician might not see it and the woman may never know.

How does a woman end up with two wombs? In the embryonic stage of human development, a female has more than one "uterine horn," or tubes that ultimately fuse into one uterus. In people with this condition, somewhere in the developmental process the tubes didn't come together, most likely because there was an error in the signals cells received instructing them to migrate to certain places.

Where do the double uteruses sit in the body, and what do they look like? They are in the same place that a single uterus would be—in the pelvis right behind the bladder and in front of the rectum.

Assuming the woman is not pregnant, the twin uteruses take up about as much space as a single uterus, which is about the size of a pear. Together they resemble a valentine's heart, each having a round top and a tapered bottom.

So if you cut the heart down the middle, each side would look like a uterus. In either scenario, the tests you may be offered are the same. High-frequency sound waves are used to create images of the inside of your body. The sonographer will put some cool jelly on the end of a device called a transducer and apply it to your abdomen so that they can see how your uterus looks.

If they want a clearer image of the inside of the uterus, they might suggest a transvaginal ultrasound , in which the transducer is inserted into the vagina. This is another ultrasound, but in a sonohysterogram the images are taken after a fluid is inserted into the uterus through a thin tube that is put into the vagina. This allows the doctor to see any abnormalities in the shape of the uterus that may be present. Magnetic fields and radio waves are used to generate cross-sectional images of the body.

For this test, a woman needs to lie completely still in a machine that looks like a large tunnel. During this test , a dye is inserted into the uterus via the cervix. As the dye travels through, X-rays allow a doctor to see the size and shape of your uterus. For women who have a double uterus but are experiencing no symptoms, there is no need to treat the condition. Those who experience recurrent miscarriages that have no other medical explanation may be offered the surgery.

Women with a double vagina and a double uterus may benefit from surgery to remove the dividing membrane in their vagina. This can make childbirth easier for them. Sometimes the shape of the uterus that the fetus has implanted in leads to miscarriage. As well, women with a double uterus generally have smaller uteri, which can lead to preterm labor. If you have a double uterus and are pregnant, your doctors will want to monitor your pregnancy very closely to ensure that all is well with your baby.

It contracts during labor to push the baby out. This is the smooth outer layer. It covers the uterus and makes it easy for the uterus to move in the pelvis as needed.

In women who still have their periods, 1 ovary releases an egg into a fallopian tube each month. During this time, the endometrium becomes thicker to prepare for a fertilized egg. The egg enters the uterus. If the egg joins with a male sperm cell, this fertilized egg attaches to the endometrium. A double uterus may have one opening cervix into one vagina, or each uterine cavity may have a cervix.

In many cases, a thin wall of tissue runs down the length of the vagina, dividing it into two separate openings. Women who have a double uterus often have successful pregnancies. But the condition can increase the risk of miscarriage or premature birth. A double uterus often causes no symptoms. The condition may be discovered during a regular pelvic exam or during imaging tests to determine the cause of repeated miscarriages. Women who have a double vagina along with a double uterus may initially consult a doctor for menstrual bleeding that isn't stopped by a tampon.

In these situations, the woman has placed a tampon in one vagina, but blood is still escaping from the second uterus and vagina. Seek medical advice if you have a menstrual flow despite the insertion of a tampon, or if you have severe pain with menstruation or experience repeated miscarriages. Doctors aren't certain why some fetuses develop a double uterus and others don't.



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