most potent estrogen, principal estrogen in PRE-menopausal women
estradiol
metabolite of estradiol, principal estrogen in post-menopausal women
estrone
metabolite of estradiol produced in placenta, least potent
estriol
the same amount of hormone in pill every day (28) w/7 placebo pills
monophasic
amount changes 1/2 way through cycle
biphasic
amount of progestin changes every week, estrogen stays the same
triphasic
estrogen and progestin change throughout month
quadriphonic
3 month to 1 yr
extended cycle