If i'm on the microgynon birth control pills will it cause me to have off and on bleeding?

Irregular pill bleed: This pill has the same hormone dose in each pill, 30 mcg of the estrogen, so usually this recipe does not have a lot of irregular bleeding if you are taking it regularly for 21 days with a 7 day period week. Except in the first few months, when it is common to have some irregular bleeding. After that if you get new irregular bleeding, you should check for infection, pregnancy, medication problems.