I say this because there are certain medications meant for men, like
Avodart for enlarged prostate, that
women are told not to even handle. They say so on the commercials for this medication. If women are told not to even handle Avodart, which would mean that it can be absorbed through the skin, I would think you may be right about the possibility of you absorbing the hormones from the IUD. But, I suspect some doctor may refute this, although I don't know why.