I don't think that low iron will increase your risk of having a bleed, but if you do happen to have one then it will totally wreck you for a while because you are already low in iron to start with. I am happy to stand corrected on that one though. I had a bleed after my 3rd baby, but my iron was fine and I felt like crap for the first few days till I had a blood transfusion. With my 4th I did have lowish iron but I never had a bleed and felt great after the birth.