Last, but not the least, you must try natural female libido enhancement pills. Such pills are formulated with powerful ingredients that include herbs, minerals and vitamins. The endocrine system is really a band of glands that regulate our bodies with hormones. The glands are ductless, in order that they release hormones directly into the bloodstream. Hormones are chemical messengers which have specific targets called receptors. There are three kinds of hormones: steroid hormones, amino acid derivatives, and peptide hormones. The concentration of hormones inside bloodstream is regulated through feedback loops.