I have been on EstroStep FE for about a year. I am switching to Yasmin next month. During the time I've used EstroStep, my fiance and I have always used a back-up method during the first 7 days of my pack since I'm a Sunday starter. Was this necessary? or is it only necessary for the first pack?
So when I start my Yasmin, after the first month do we need back up contraception?