"works. i had unprotected sex one day after i stopped menstruating completely. and i thought i would have to wait longer than mentioned on the reviews here to get my period. but it started in 6 days, and i could never be more relieved about a second period in the same month. until i got my period i didn&#039;t have any side effects except extreme sleepiness. during my period i am feeling weaker than usual and no cramps yet. the bleeding pattern seems different (amount, colour ) but i presume that is one time and to be expected."