ummm you dont know much about physiology, do you? there is no reason why a miscarriage prior to your conception would have any effect on your life. that is just fucking stupid. however, aside from an anatomy lesson, if you are looking for a religious or theological perspective, it is possible that your soul is the innocent that died, and the powers that be gave that life to your mother. so, either way, quit whining, be glad that you exist, and that you have a chance at life. it is more than millions of babies get every year.