STUDY DESIGN Cross-sectional design is used to know the role of FADS1 and FADS2 gene polymorphism in LCPUFA composition at birth (from buccal swab), Extended cross-sectional designed is used to look at FLG gene mutation effect as the predictor of the emergence of atopic dermatitis, FADS1 and FADS2 gene polymorphism role in atopic dermatitis occurences, the role of DHA intake and DHA to AA ratio in preventing atopic dermatitis occurences in the first year of life.