Process for the synchronization of ovulation for timed breeding without heat detection

摘要

A method for synchronizing ovulation in sows and gilts by a single injection of hormones is disclosed. A hormone, gonadotropin releasing hormone (GnRH), luteinizing hormone (LH), follicle stimulating hormone (FSH), human chorionic gonadotropin (hCG), analogs, derivatives, agonists or combinations thereof is administered to an open sow post weaning at a specific time to stimulate ovulation of mature responsive follicles. The sow is then bred, without heat detection, at a specific subsequent timed interval after injection with hormone, with one or two artificial or natural breedings. In gilts, the hormone is injected at a timed interval from onset of estrus or at a specific timed interval following Prostaglandin F2a for those gilts which have been held in a state of pseudopregnancy.

主权项

1. A method of synchronizing time of insemination in a gilt, the method comprising the steps of:
administering to the gilt, wherein the gilt is pregnant or is in a pseudopregnancy state, a prostaglandin to terminate the pregnancy or the pseudopregnancy state; administering to the gilt a single dose of a hormone selected from the group consisting of a gonadotropin releasing hormone (GnRH), or an analog or derivative thereof, for synchronizing ovulation in the gilt wherein the hormone is administered as a composition comprising hydrogel-forming materials; and breeding the gilt using one artificial insemination step, wherein the method is performed without heat detection.