Uso de la GNRH al momento de la inseminación artificial en vacas doble propósito.

Abstract

Artificial insemination protocol was used in a group of 40 breeding cows of the Senepol Brahman, Brown Swiss and their mating races who are between 45 to 60 days of calving. They are cows that between two and five deliveries, with a body condition score between 2.8 and 3.2. These cows are free to reproductive diseases and a good reproductive system, successful insemination protocols depends largely on the health status of the animals selected for insemination. The challenge now was to try to increase pregnancy rates to standard protocols of IATF Impregnated using progesterone, estradiol benzoate on day zero and prostaglandin PGF, estradiol cypionate, equine chorionic hormone day eight and removal device and insemination at 54 h and intramuscular injection time intravaginal devices GNRH.al Using insemination various hormones as here GnRH when insemination, in order to achieve increased average pregnancy. It is appropriate to mention that the work done in the internship, were six pregnant cows of the ten who were treated with GnRH at the time of insemination in a first group and a second group, were seven pregnant group of ten were treated with GnRH at the time of insemination, what can be established that 65% of the animals treated with GnRH resulted in pregnancy and 35% no.The above results establish that treatment with GnRH, is not as effective in economic terms and time as you might think, because the differences between the animals treated and untreated, are not as large, in terms of percentages pregnancy.