Following the development of the nicotine patch comes the Oestrogen hormone patch. Apply one patch every 24 hours - it's as simple as that! Oestrogen Hormone Precursor patches are designed to stimulate the body's own chemical transformation into producing feminine defining hormones. Oestrogen is the female hormone produced after puberty that triggers breast growth and the development of the envied feminine hourglass figure, with rounded breasts and thighs. Oestrogen Hormone Precursor patches can be worn discreetly.