Hi Raztac, just to correct the previous post! Progynova patches do not contain Estradiol valerate. That's the tablets. The patches contain the same estradiol as all the other patches so nothing to do with that. They are a weekly change patch so maybe levels are dropping off and you are absorbing differently? More likely is that sdie effects are due to the mirena which releases progestogen at higher amounts initially. Some women find they need a higher dose of oestrogen when they have a mirena, not to "balance" the progesterone as such but to try to drown out any negative side effects.
In haste!
Hurdity x