Steffi,
Whatever you choose to call it maybe consider in an embyo's development not everything goes according to the rules as we are so complex . Not only that the mother's diet and health can affect it . Correct cell growth is dictated by many variables a lack or excess of certain chemicals can alter how that cell performs but perhaps not it's growth . Somewhere in that mix is gender development and sexual assignment , it isn't surprising we are all different . Being TG is no one's fault , it happens , that is what society has to acknowledge along with being gay etc .
