| investigation of individual and group variability in estrous cycle characteristics in female asian elephants (elephas maximus) at the oregon zoo. | evaluating ovarian cycle activity through longitudinal progestagen monitoring is important for optimizing breeding management of captive elephants and understanding impact of life events (births, deaths, and transfers) on reproductive function. this study summarized serum progestagen profiles for eight asian mainland elephants (elephas maximus indicus) and one bornean elephant (e. maximus borneensis) at the oregon zoo over a 20-yr interval, and represents the longest longitudinal dataset evaluat ... | 2012 | 22578614 |