The Effects of Body Weight, Body Condition Score, Age, Lactation, Serum Trygliceride, Cholesterol and Paraoxanase Levels on Pregnancy Rate of Saanen Goats in Breeding Season

The purpose of this study was to determine the relationship between pregnancy rate and body weight, Body Condition Score (BCS), age, lactation, serum triglyceride, cholesterol and paraoxanase levels of Saanen goats in breeding season. Data were obtained from 55 Saanen does under kept semi-extensive conditions. For estrus synchronization, vaginal sponges containing 40 mg Fluorogestone Acetate (FGA) were applied for 14 days and 500 IU equine gonadotropin hormone (eCG) was injected on the day of vaginal sponges removed. Blood samples were collected from vena jugularis also body weights, body condition scores (5-point scale), ages and lactation status of all goats were recorded at the time of sponges removed. Estrus detection was performed with teaser buck at 48 h after removal of the sponges. All does in estrus were mated with fertile bucks. After 12th day of post-mating, 4 μg gonadorelin was injected intramuscularly for enhance luteal function. Pregnancy diagnosis was performed by transrectal ultrasonography at 40th day of post-mating. The relationship between pregnancy rates and body weight, BCS, age, lactation, blood triglyceride, cholesterol and paraoxanase levels at mating day were statistically analyzed. The body weight and BCS were significantly effected the pregnancy rates (p<0.05) but there were no relation between pregnancy rate and other parameters (p>0.05). It is concluded that body weight and BCS has a significant effect on fertility of Saanen goats during breeding season and the necessity of using higher energy feeding in goats with lower BCS and weight before breeding season.