I know that when some women get below a certain level of bodyfat they may not get their periods anymore. This happend to me a few years back, but I gain a few pounds and was regular every month. I do not take BC and I am definately not pregnant cause I just had my last period two weeks ago, however all of the sudden I am spotting. I was thinking that maybe it was becasue I have been training hard these past few months and have lowered my body fat again. Does anyone else know any other reasons for this, I just need to know if I should be concerned enough to make a visit to the doctor?? Thanks for the help girls!