Is there any reason that a Jewish woman who has permission from her Rabbi to use birth control could not choose a pill that stops her from menstruating? Although certain birth control pills are specifically designed for this type of usage, almost any birth control pill can in fact be used this way. Using any birth control pill in this manner for any length of time is widely considered safe.

Would the simple desire (hers or her husband's) to avoid niddah periods be a sufficient reason for her to do so, or would she need a stronger reason?