Abstract: The invention comprises an oral Omega-3-fatty acid-rich oil emulsion composition comprising DHA 50-100 mg/ml, made from all natural and biocompatible ingredients for use in management of treatment of a disorder to overcome the same. The composition may be a thixotropic emulsion in nanometric size range having better absorption, better stability at room temperature and refrigerated one (2-8° C.), either alone or in combination with vitamins, minerals, Generally Regarded As safe (GRAS) natural ingredients. in therapeutically effective amount. The disorders comprise pre-term birth disorder in pregnant women, cognitive disorders in children and cardiovascular disorders. The said emulsion is made by adding an oil phase comprising a natural emulsifier to an aqueous phase comprising a gum. Vitamin E TPGS, a preservative and a high intensity sweetener; under mechanical stirring. This invention also embodies a High Performance Liquid Chromatography (HPLC) method for assay of omega-3 fatty acids.