THE USE OF HORMONAL METHODS ON GILTS REPRODUCTIVE CYCLES

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%

PROSTAGLANDIN F2α SUPPLEMENTED SEMEN IMPROVES LANDRACE BOARS SPERM MOTILITY

This study investigated whether the sperm motility from Landrace boars improveswhen PGF2α (Dinolytic®; 5 mg PGF2α /ml) was added to diluted semen. Boars fromone large production unit, were manually collected; semen was either enriched withPGF2α (group 1, n=38), either untreated (group 2, n=32). Total volume of semencollected, percent of motility and number of obtained doses were recorded. Thehighest sperm volume collected from the two groups is corresponding to ejaculatesfrom Landrace boars with PGF2α supplemented semen (267.6 m)l. Regardingmotility, the sperm collected from Landrace boars with PGF2α supplemented semenwas higher from the one collected from Landrace boars with untreated semen(81.37%) and very significant differences were statistically determined. Theejaculates with highest number of obtained doses is corresponding to the onescollected from boars with PGF2α supplemented semen (25.21). Only boars from thefirst group (with PGF2α supplemented semen) showed motility over 70% and even100%. The untreated semen showed motility values around 65-70%