Hi Dr. Purushottam welcomes you to HCM virtual clinic. I have gone through your query. I think I have understood your concern, I will try to suggest you the best possible treatment options. 1]It is very sad to know about your pregnancy losses. 2] Placenta previa happens due to implantation of embryo in the lower segment of the uterus. There is no medication or treatment for it not to take place. 3] I will suggest to wait till at least 3 months after your last delivery. 4]I will suggest you following- Drink plenty of water. Indulge in routine exercise and healthy diet regimen. Avoid fried foods, Salty foods, refined sugars. Avoid substance abuse , if any. Include more portions of fruits, vegetables and salads in diet. 5] Also start with folic acid, B 12, Multivitamin and multi mineral supplements at least 3 months before you are planning for pregnancy. 6] If there is placenta previa present when you are at term, delivery by Cesarean section is advisable. I hope my answer helps you. Thanks. Wish you good health. With regards Dr Purushottam