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Friday, August 30, 2013

Sensitive periods for Ovsynch treatment

Keywords: cow, synchronize, bovine, estrous, estrus, cycle, follicle, wave, Ovsynch


A diagram modified from several sources, showing an estrous cycle with three follicle waves. The physiology of two or three follicle waves is important during “Ovsych” treatment (GnRH-Prostaglandin-GnRH) because it is only those follicles that have already been recruited and already growing in a follicle wave that will ovulated after GnRH treatment; an essential step in re-setting the recruitment of follicles so that a mature follicle will be available for ovulation about 8 to 9 days later. This image shows the periods of time (vertical grey bars) during which follicles can be induced to ovulate by GnRH treatment.