Process for the Synchronization of Ovulation for Timed Breeding Without Heat Detection

摘要

A method for synchronizing ovulation in sows and gilts without heat detection 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), analogues, 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 weaned sow, the method comprising the steps of:
a. administering a composition comprising a hormone selected from the group comprising a gonadotropin releasing hormone (GnRH) or an analog or derivative thereof in a controlled release, injectable excipient without sequential hormonal intervention, the controlled release, injectable excipient being selected from the group consisting of sucrose acetate isobutyrate (SAIB) and block copolymers based on ethylene oxide and propylene oxide and is administered to the sow after a timed interval post weaning; b. breeding the sow at a defined time after administration of the hormone in a single artificial insemination step; and c. carrying out the method without heat detection.