The placenta can move during pregnancy, and often times does to a certain degree. The problem with the placenta covering the cervix (placenta previa) is that it opens up the risk of bleeding. The placenta is the site/organ where mom's blood gives to the baby's blood. Oxygen, nutrients and wastes are exchanged there. The placenta if attached over the cervix is at risk once the cervix starts to open. Bleeding occurs and the oxygen and blood supply of the baby is compromised. For this reason, placenta previas do warrant c-sections. However, where you are at 20 weeks, you still have 20 weeks of pregnancy to go, and your placenta will probably travel. It bears watching, but not worrying.
Thanks for the answer to both my questions Guess I'm just going to have to wait and see what happens in my next scan. I really would prefer not to have a c-section but if it turns out I have to then I have to I suppose. I'l keep my fingers crossed the OB has some good news.
I heard it tends to move up for most people so you shouldnt worry about the c section yet..
Of course if it does start to cover your cervix, a c section may be the only option..
I dont know the fine details of partial coverage and vaginal birth.. Im sure someone else will post about it as I have seen it on here several times
But from my understanding from reading other people's situations in most cases it moves up and does not end up being an issue.