Effect of the use of single dose of prostaglandin F2α in cows after one month of calving, to determine the heat induction in the local cows of suburban area of N'Djamena, Cha
Abstract
The objective of this study was to evaluate the effect of the systematic use of a single amount of the prostaglandin F2α after one month of calving on the renewal of sexual activity of beef at Chad. (Sixty five (65) cows of local breeds from N'Djamena urban area were selected and divided Into two groups: Forty-three (43) cows were treated with Prostaglandin F2α, one month after calving and 22 cows as witnesses. More than half (60.46%) of the cows answered the treatment and 39.54% did not react. The answer varied with the parity (68%) for the first half of the cows against 32% for the multiparous but the body weight at calving did not-have an effect. Only, the acceptance of overlapping was Retained for the detection of return in heat, which took place on an average of 2.36 ± 0.14 days after treatment. The treatment made it feasible to-have-one year interval between calving (first heat of 32.36 ± 0.14 days.) Heat thus obtained, can be used as reference to the stockbreeders to program the reproduction of their herd in order to have one year interval calving-calving closed. This test sample gave better Indication in first half of the cows while waiting for confirming it in the station.
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