read about estrogen dominance and PMS, not sure how solid the research is but makes sense to me,
if must, get one with the lowest estrogen and high progestin,,,IMO,
my girl just came off of the BC because of her weight issue, lack of period and all that, she got on BC awhile ago to reduce PMS, now after flushing it out of the system and with nolva and dong quai, shes all normal. she did have some estrogen rebound for a week or so. thats just her though i dont recommend the mentioned compounds unless she gets some testing done to verify
have her gyno check her,
total/free test
E2
progesterone
cortisol
DHEA
to start..
dont mess with hormones your body or her body