|Progesterone is a steroid hormone which is essential to regulate menstrual cycle, pregnancy, and embryogenesis. During pregnancy, progesterone also helps in the development of mammary glands to stimulate milk production. It also acts as a neurosteroid to promote brain function.The top open access journals are peer reviewed scholarly journals of Journal of Autacoids & Hormones. The top open access journals are freely available on the public internet domain, allowing any end users to read, download, copy, distribute, prink, search or link to the full texts of the articles. These provide high quality, meticulously reviewed and rapid publication, to cater the insistent need of scientific community. These journals are indexed with all their citations noted. The top open access journals are indexed in MEDLINE, PUBMED, SCOPUS, COPERNICUS, CAS, EBSCO and ISI.