Process for the synchronization of ovulation
First Claim
1. A method for synchronizing ovulation in cattle, the steps comprising:
- (a) administering a first dose of a hormone selected from the group consisting of a gonadotropin releasing hormone (GnRH), a luteinizing hormone (LH) and a human chorionic gonadotropin (hCG), to an open cow during an estrous cycle in an amount effective to stimulate ovarian follicle development;
(b) subsequent to step (a) and after a period of time sufficient for development of a dominant follicle, administering a dose of prostaglandin F2α
(PGF2α
) in an amount effective to initiate corpus luteum regression;
(c) concomitantly with or within a period of 3 days subsequent to step (b), administering a second dose of a hormone selected from the group consisting of LH, hCG and GnRH to stimulate ovulation of said follicle; and
(d) concomitantly with or within one day prior to or subsequent to step (c), breeding said cow.
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Abstract
A method for synchronizing ovulation in cattle by sequential injection of hormones is disclosed. A hormone selected from the group consisting of gonadotropin releasing hormone (GnRH), luteinizing hormone (LH), or human chorionic gonadotropin (hCG) is administered to an open cow during an estrous cycle in order to stimulate follicle development. Prostaglandin F2α (PGF2α) is then administered to initiate corpus luteum regression about five to eight days after administration of the GnRH, LH or hCG. A second dose of GnRH, LH or hCG is then administered concomitantly with the PGF2α injection or up to about three days after the PGF2α injection. This second dose of hormone functions to stimulate the ovulation of a dominant follicle and the cow is then breed within one day of the administration of the second dose of hormone.
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Citations
40 Claims
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1. A method for synchronizing ovulation in cattle, the steps comprising:
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(a) administering a first dose of a hormone selected from the group consisting of a gonadotropin releasing hormone (GnRH), a luteinizing hormone (LH) and a human chorionic gonadotropin (hCG), to an open cow during an estrous cycle in an amount effective to stimulate ovarian follicle development; (b) subsequent to step (a) and after a period of time sufficient for development of a dominant follicle, administering a dose of prostaglandin F2α
(PGF2α
) in an amount effective to initiate corpus luteum regression;(c) concomitantly with or within a period of 3 days subsequent to step (b), administering a second dose of a hormone selected from the group consisting of LH, hCG and GnRH to stimulate ovulation of said follicle; and (d) concomitantly with or within one day prior to or subsequent to step (c), breeding said cow. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for synchronizing ovulation of cattle, the steps comprising:
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(a) selecting a group of cows comprising a plurality of open cows; (b) administering a first dose of a hormone selected from the group consisting of a gonadotropin releasing hormone (GnRH), a luteinizing hormone (LH) and a human chorionic gonadotropin (hCG), to said cows during estrous cycles in an amount effective to stimulate ovarian follicle development; (c) subsequent to step (b) and after a period of time sufficient for development of dominant follicles in said group of cows, administering prostaglandin F2α
(PGF2α
) to said selected group of cows to initiate corpus luteum regression;(d) concomitantly with or within a period of 3 days subsequent to step (c), administering a second dose of hormone selected from the group consisting of GnRH, LH and (hCG) to stimulate ovulation of said dominate follicles; and (e) concomitantly with step (d) or within one day of the administration of said dose of GnRH in step (d), breeding said group of cows. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification