The effect of blood BHBA level on fertility in sheep

The aim of this study was the effect pre-synchronization blood BHBA level on pregnancy rates sheep in non-breeding season. For purpose, 100 Merino/Merino crossbred ewe, aged 2-4 years, who have given one birth before, were used study. synchronization purposes, progesterone containing sponges 60 mg Medroxyprogesteron acetate (MPA) analogue, administered intravaginally for 14 days. (betahydroxybutyric acid) measurement made by drawing each animal day administration. 500-700 IU PMSG injected at time sponge withdrawal. Oestrus observed 24 hours after withdrawal with help teaser ram. Animals which estrus hand mated. Pregnancy status recorded ultrasound using transrectal probe interval 35-45 days mating. All synchronized animals determined to be and their mating performed. As a result examination, 57 (57%) became pregnant 43 (43%) did not become pregnant. Blood values measured range 0.12 mmol/L -0.66 (n:100) present average as 0.35±0.083 determined. While found 0.29±0.005 mmol/L, non-pregnant 0.41±0.073 statistically significant (p<0.001). In addition, it that there strong negative correlation between (r = −0.719, p<0.001). result, concluded no literature about relationship fertility parameters mentioned period, presented contribution literature. It has been higher success can achieved from low levels, increased regulating energy balance high criterion considered achieving target 3 lambing 2 years terms herd management breeding.