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Cattle Boards
Breeding / Calving Issues
Synchronization - But possibly bred?
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<blockquote data-quote="milkmaid" data-source="post: 543930" data-attributes="member: 852"><p>OK, so I decided I'd better look it up :lol2:...</p><p></p><ul> <li data-xf-list-type="ul">GnRH: Gonadotropin-releasing hormone. A hormone made by the hypothalamus (part of the brain). GnRH causes the pituitary gland to make luteinizing hormone (LH) and follicle-stimulating hormone (FSH). These hormones are involved in reproduction. Also called gonadotropin-releasing hormone. <br /> <br /> GnRH is the abbreviation for gonadotropin releasing hormone, a natural hormone that is released from the hypothalamus in the brain. GnRH causes the release of two other hormones known as gonadotropins from the pituitary gland. Luteinizing hormone (LH) and follicle stimulating hormone (FSH) are the gonadotropins. During the normal estrous cycle, when the proper signals are sent to the hypothalamus, GnRH is released to cause the release of these gonadotropins, which have an impact on the ovary. One of these effects is the release of a high level of LH, termed an LH surge, which causes ovulation of a follicle. <u>This LH surge also initiates development of a new corpus luteum (CL) on the ovary.</u></li> </ul><p></p><p>That makes it sound as if GnRH would be perfectly safe to give the heifer, and it coincides with what dun said about giving GnRH on day 21 during the hot summer months. It'd support the CL, not destroy it.</p></blockquote><p></p>
[QUOTE="milkmaid, post: 543930, member: 852"] OK, so I decided I'd better look it up :lol2:... [list]GnRH: Gonadotropin-releasing hormone. A hormone made by the hypothalamus (part of the brain). GnRH causes the pituitary gland to make luteinizing hormone (LH) and follicle-stimulating hormone (FSH). These hormones are involved in reproduction. Also called gonadotropin-releasing hormone. GnRH is the abbreviation for gonadotropin releasing hormone, a natural hormone that is released from the hypothalamus in the brain. GnRH causes the release of two other hormones known as gonadotropins from the pituitary gland. Luteinizing hormone (LH) and follicle stimulating hormone (FSH) are the gonadotropins. During the normal estrous cycle, when the proper signals are sent to the hypothalamus, GnRH is released to cause the release of these gonadotropins, which have an impact on the ovary. One of these effects is the release of a high level of LH, termed an LH surge, which causes ovulation of a follicle. [u]This LH surge also initiates development of a new corpus luteum (CL) on the ovary.[/u][/list] That makes it sound as if GnRH would be perfectly safe to give the heifer, and it coincides with what dun said about giving GnRH on day 21 during the hot summer months. It'd support the CL, not destroy it. [/QUOTE]
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