Allergy affects without distinction both sexes. Nevertheless some allergens are responsible more frequently for contact dermatitis in females. The components of cosmetics and in first fragrance are indeed responsible for numerous contact dermatitis because of their increasing use. Nickel allergy is the most frequent contact allergy in women with a rate of 20-40% of female population and only 3-5% of male population. Specific female allergies such as allergy to seminal liquid or autoimmune progesterone dermatitis are on the other hand exceptional.