Sassy:
It is probably a bad thing for me to be giving any kind of specific medical advice as that might constitute establishment of a physician-patient relationship. But for the sake of example...
It is not unusual for patients on OCP's to miss cycles even while on them. Sometimes women will miss periods after discontinuing them- "post-pill amenorrhea".
By decreasing BF%, the amount of fatty esters available to produce sex steroids (i.e. Estrogen and Progesterone) is also decreased, resulting in a hypoestrogenic state (low estrogen). Without estrogen, the lining of the uterus does not grow and amenorrhea (no periods) ensues. A big problem is the use of steroids, which I
TRULY abhor from a medical perspective. This contributes to another, more complex, problem which is caused by many factors, including the use of AS, as well as low BF%, and excessive exercise called hypogonadotrophic amenorrhea, which simply means that it's coming from the brain and not the ovaries.
Just remember... have you ever noticed that the first 4 letters of Amenorrhea are "AMEN"?
The only significant danger from hypoestrogenic amenorrhea is the risk of osteoparosis which is essentially negated by the excessive weight-bearing exercises performed by BB's and Powerlifters.
-thebabydoc