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THE USE OF HORMONAL METHODS ON GILTS REPRODUCTIVE CYCLES

Abstract

The main purpose of the current research was to conduct the reproductive cycle ongilts, using hormonal methods to induce estrus in non-cycling and late pubertal giltsand to group in a short period of time the breedings and, in the same time, to inductfarrowings. The gilts that have made the object of this experiment were distribute intwo equal lots and they were treated with PG 600 (400 I.U. PMSG and 200 I.U.hCG) to induce estrus in two consecutive weeks. The main reproductive objectivesthat we have observed were the percentage of gilts that came into heat, the timerange when the gilts showed signs of estrus and the gestation rate after pregnancycheck at 28 and 56 days from breeding. The percentage of the gilts that were in heatafter PG 600 was 67 %. The majority (44.8 %) of gilts were in heat after 72-96hours from PG 600. The gestation rate at 28 days after insemination was 64.6 % andat 56 days after insemination was 53.0%

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