Use of ultrasonography to detect ovarian response in goats submitted to multiple ovulation and embryo transfer program

作者：Grizelj Juraj^*; Vince Silvijo; Samardzija Marko; Gonzalez de Bulnes Antonio; Dovenski Toni; Turmalaj Luigj; Zevrnja Branimira

来源：Veterinarski Arhiv, 2013, 83(2): 125-134.

• ultrasound
• superovulation
• ovulation
• follicle
• corpus luteum
• goats

The aim of this research was to establish the importance and accuracy of ultrasonic examination of goats in order to estimate the superovulatory response. For this reason, 28 donor goats were systematically examined by real time ultrasonography to count the preovulatory follicles at observed oestrus onset and to confirm respective ovulation(s) 48 h later. The accuracy of ultrasound exams was analysed comparing the number of preovulatory follicles with number of corpora lutea (CL%26apos;s) counted during embryo collection. The total relative undervalue of ultrasound prediction of multiple ovulation was found to be 19.4%. In all ovaries examined, the total number of preovulatory follicles minus number of unovulated follicles was lower than the number of CL%26apos;s. The relationship between the predicted ovulation rate and number of CL%26apos;s was positive and significant (CL 3.98 + 0.75 follicle; r(2) 0.93), with significantly higher intercept (1.45) for the right ovary. Also, the accuracy of ultrasound to establish the ovulating and non-ovulating goats was 100.0%. However, determination of the exact number of multiple ovulations on ovaries was 45.0%. In conclusion, the ultrasonography of donor goats is an useful tool to monitor follicular dynamics and success of superovulation procedures. Counting the number of follicles %26gt;4 mm in diameter at the oestrus onset and confirming the ovulation is a good method for selection of responding goats prior to flushing of uterus.