It's called low lying placenta. The placenta can attach anywhere inside your uterus, yours happened to attach to the uterus cown below your baby. If it is covering the cervix, it is called placenta previa and you would have to have a C-section because the baby can't get out if the placenta is in the way. It can migrate (even though it is attached, think of your uterus like a balloon and imagine something stuck to a spot on the inside near theopening. As the balloon inflates and expands, it can move the obstruction away from the mouth... the same thing can happen with your placenta as your uterus grows and expands.) So if it moves out of the way, you can deliver vaginally. Sex can start labor, and if it hasn't moved you don't want to go into labor. Google "low lying placenta" or "placenta previa" to get more info. It is really only a problem for labor, not a risk for you or the baby otherwise.
at 11:37 AM on Oct. 22, 2008