Iron Supplement

Kathrina
Hi! Im 10 weeks on the way and This is my first pregnancy that I am going to keep so everything is really new to me. The doctor prescribed me prenatal vitamins and Iron supplement. Im just wondering if thats normal coz the prenatal already has iron. Is it not too much? Or is there something wrong with me? I just had the initial check up last Nov. 2. She didn't tell me much. More of an interview. Thank you.