"i have been taking birth control pills for many years and orth tri-cyclen lo has been very tolerable with no side-effects besides one: pregnancy. i thought it was better than all the others i&#039;ve tried since it didn&#039;t give me headaches or nausea, but i&#039;d take headaches and nausea any day over this. i took this pill exactly as directed, at the same time every morning, never missing a single pill. i avoided foods and medication that could possible interfere with the pill&#039;s effectiveness. after a year of being on ortho tri-cylcen lo and having periods you could set your watch to, i noticed i was a day late. unfortunately, i have become part of that very small percentage of women that becomes pregnant while taking hormonal contraception."