A uterus is a pear-shaped organ, typically measuring about 3 inches long, 2 inches wide, and 1 inch deep. The lower part of the uterus dives slightly into the vagina and creates an opening called the cervix. This is the opening through which the baby will pass to enter the birth canal during delivery. The baby grows in the upper portion of the uterus, called the fundus.
Rarely, a woman will have an abnormally shaped uterus. A bicornuate uterus is heart-shaped. The fundus has a sharp indentation at the top, with two “horns” that connect to the fallopian tubes.
This abnormality is not very common. About 1 in 200 women are thought to have a bicornuate uterus. Often times women don’t know they have this condition until they get pregnant.
Pregnancy Complications with a Bicornuate Uterus
If the deformity is slight, there’s a good chance that the shape of your uterus won’t affect your pregnancy at all. Many women who have this condition carry their pregnancies to full term or nearly full term.
However, there are some risks for complication, including:
If your baby grows too large for the space your uterus allows, your uterus might overstretch, causing your water to break early. This sometimes results in preterm labor.
When your cervix is too weak to keep the baby inside, it may start to open prematurely. Your OB-GYN can strengthen your cervix with cerclage.
Your uterus’s bicornuate shape may make it more difficult for the baby to get into the ideal position for birth. You may need to deliver by Cesarean section, as it’s generally not recommended to try to correct the baby’s positioning when your uterus is abnormally shaped.
What Should I Do if I have a Bicornuate Uterus?
It’s understandable that you may anxious about your pregnancy, especially if you have a history of miscarriages. The best possible thing you can do for your baby is to keep every prenatal appointment so that your OB-GYN can keep a close eye on your baby’s development.