General and Comparative Endocrinology 

TL;DR: This review examines the growing evidence that GC concentrations in free-living reptiles, amphibians, and birds, but not mammals, are commonly elevated during the breeding season and test three hypotheses with different focuses on GC's energetic or behavioral effects, as well as onGC's role in preparing the animal for subsequent stressors.

TL;DR: In this article, the effects of progestin, androgens, and estrogens on global testicular gene expression patterns (microarray analysis), and molecular mechanisms by which steroids regulate specific candidate genes (identified by subtractive hybridization approaches) during early stages of testis maturation are discussed.

TL;DR: Recent advances on teleost fish oocyte differentiation, maturation and ovulation are highlighted, including those involved in the degeneration and reabsorption of ovarian follicles (atresia).

TL;DR: It is argued that biological actions of GCs at "non-stress" seasonal concentrations play a critical role in the adjustment of responses that accompany predictable variability in the environment and demand more careful consideration in future studies.

TL;DR: Although precise information as to the physiological effects of KiSS1 in fish, notably on GnRH neurons and gonadotropin release, is still limited, KiSS neurons may emerge as the "gatekeeper" of puberty and reproduction in fish as in mammals.