X-linked dominant disorders are caused by mutations in genes on the X chromosome, one of the two sex chromosomes in each cell. In females (who have two X chromosomes), a mutation in one of the two copies of the gene in each cell is sufficient to cause the disorder.
Common Questions and Answers about Estrogen patch types. vivelle-dot. I did not want to go through menopause or life with no estrogen at age 35, so I opted for the estrogen hormone therapy. I chose to go with the Estradiol patches.
One method of contraception is the patch. The contraceptive patch is a sticky patch, a bit like a nicotine patch, measuring 5x5cm. It delivers hormones into your body through your skin. In the UK, the patch's brand name is Evra. It contains the same hormones as the combined pill, and it works in the same way.