Hi kindredspirit, I used to use a conti patch, FemSeven Conti and was fine on it for about 16 months. I then started having a show of dark brown blood approximately every month and then every two weeks. I had all the tests done and all that could be found was a very slightly thickened endometrium lining. 6.1mm.
The doctor seemed to think I was not getting enough progesterone to balance the total amount of estrogen in my body from both the patch and my fat cells. I did not have high cholesterol though, in fact the hrt kept mine low