"i lost 5 pounds after a month of using tri-nessa. it was the 3rd or 4th birth control i tried, and the only one that keeps my period under control. with the other birth controls i tried, i had 2 periods per month! not fun when you are a newlywed!! i have been taking tri-nessa for 4 years and have not gotten pregnant. the only complaint i have is lower sex drive, but there are ways around that! ;-)"