Frequently given to help regulate irregular periods or to treat heavy menstrual periods. In this setting, the birth control therapy frequently does help. The irregular periods and heavy menstrual cycles can sometimes be corrected to such an extent that they even remain corrected even after therapy has been discontinued. Sometimes, however, the irregular menstrual cycle and heavy periods resume once birth control pill therapy has been discontinued. Proper thyroid hormone treatment can often be used in Wilson’s Temperature Syndrome patients to treat the irregular periods and heavy menstrual cycles with there being persistent improvement even after the therapy has been discontinued. So, in cases where irregular menstrual cycles and heavy periods do not remain persistently improved after birth control therapy has been discontinued, persistent improvement might be accomplished through the use of thyroid hormone therapy (in Wilson’s Temperature Syndrome sufferers).