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Ovulation-inducing factor (OIF) is a protein present in llama seminal plasma that has recently been identified as β-Nerve Growth Factor (NGF) and it induces not only a high rate of ovulation but also appears to have luteotrophic properties in this species. A 2-by-2 experimental design was used to determine the effect of treatments (OIF/NGF vs GnRH) and categories of preovulatory follicle diameter...
The hypothesis that ovulation-inducing factor/nerve growth factor (OIF/NGF) isolated from llama seminal plasma exerts a luteotrophic effect was tested by examining changes in circulating concentrations of LH and progesterone, and the vascular perfusion of the ovulatory follicle and developing CL. Female llamas with a growing follicle of 8 mm or greater in diameter were assigned randomly to one of...
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