The amount of estrogen in low dose oral contraceptive pills is:
Over time, the estrogen and progestin contents of COCs have been reduced remarkably to minimize hormone-related adverse effects. Currently, the lowest acceptable dose is limited by their ability to prevent pregnancy and unacceptable breakthrough bleeding. Although daily estrogen content varies from 20 to 50 g of ethinyl estradiol, most contain 35 ug or less. Low-dose COCs usually contains 20 ug ethinyl estradiol. Ref: Leveno K.J., Hauth J.C., Rouse D.J., Spong C.Y. (2010). Chapter 32. Contraception. In K.J. Leveno, J.C. Hauth, D.J. Rouse, C.Y. Spong (Eds), Williams Obstetrics, 23e.
30 micrograms
40 micrograms
50 micrograms
20 micrograms