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nr 04
218-221
EN
Growth hormone (GH) acts as a stimulant in anabolic processes. Animal breeders and scientists are mostly interested in its role in milk and meat production. The function of the growth hormone in human and animal reproduction has recently become an area of great interest in modern research. As has already been shown, GH plays an important role in the process of gametogenesis in females and males, by stimulating gamete production and maturation as well as embryo development. The mechanisms of GH activity are still unknown. The insulin-like growth factor I (IGF-I) has shown to be the main GH mediator. GH therapy causes a considerable increase in sperm cell concentration, their motility and IGF-I content in blood. Moreover, tests have demonstrated an association between IGF-I concentration in seminal plasma and the rate of morphologically normal spermatozoa as well as cell concentration. GH and IGF-I action on sperm cells has been proven by discovering active receptors in porcine testis and in bovine spermatozoa cells.
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tom 38
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nr 1
EN
The present study describes a rapid, simple method of bovine IVF embryo sexing by use of PCR technique. A pair of primers corresponding to the bovine amelogenin sequence has been used. The Rapid Cycler (Idaho Technology, USA) used in the current experiment enabled the PCR programme consisting of 55 cycles to be completed in less than 40 minutes. Therefore the total sexing procedure could be performed in less than 90 minutes. The described method succeded in case of 85% analysed embryos.
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