Reproductive endocrinology may be a wide and lively research field attracting considerable attention due to its implications in lifestyle. More than 1,000 articles published in the past year were found under the search words used, of which 22 papers were selected. This chapter hosts a spread of papers handling many important aspects of reproductive endocrinology including the function of latest and old genes, puberty, gonads, stem cells for gametogenesis, impact of lifestyle and environmental factors on reproduction, placental origin of psychiatric disorders, reproductive behavior. Some other chapters of this book can also host publications handling subjects associated with reproduction. There are in fact many other excellent articles published within the sector of reproductive endocrinology during the past year, some that we'd have missed in our search and yet others which weren't possible to incorporate thanks to space limitation.