When you learn that you have fibroids, it means that you have a non-cancerous tumor in your uterus. And, since your uterus is a large, layered organ, we classify and name fibroids based on where in your uterus they develop.
In case you need a review: your uterus has three layers: the outer serosa; the middle, muscular myometrium; and the inner lining—the endometrium. This endometrium is what you shed each month during your period.
Now that you’ve got the anatomy down, we’ll get to classifying fibroids. Uterine fibroids that develop beneath the outside covering of the womb are called sub-serosal. If they form in your uterine muscle, they are intramural. And if they pop up in your uterine cavity, inside the endometrium, they are submucosal.
Many women find it difficult to become pregnant while they have untreated fibroids. But, if you do become pregnant, the location of your fibroids can make a major difference in your ability to carry your child to term.
Sub Mucosal Fibroids and Pregnancy
Fibroids that develop with your womb can have the greatest impact on your pregnancy. If the fibroid is large enough to change the shape of your womb, you may experience pregnancy complications, including:
· Limited fetal growth
· Pre-mature delivery
· Placental abruption (when your placenta detaches from your uterus)
In some cases, your fibroid may require you to have a C-section. That’s because its growth can alter your baby’s position, or block off your delivery pathway.
So, that’s what you need to watch out for when you’re pregnant and have a sub-mucosal fibroid. But here’s some good news for you. Most fibroids don’t grow during pregnancy. In fact, with your changing hormone levels, some fibroids may even shrink during pregnancy. Still, given the potential risks to you and your growing baby, you should talk to your healthcare provider about your fibroids if you want to become or already are pregnant.