AVALIAÇÃO DE PERFUSÃO DE CORPO LÚTEO PARA O DIAGNÓSTICO PRECOCE DE GESTAÇÃO POR ULTRASSONOGRAFIA DOPPLES EM VACAS

Abstract

Animal reproduction is one of the pillars of the beef cattle production chain, and the use of biotechnologies has been widely disseminated and used, aiming at better zootechnical indexes, and greater economic return to the producer. The use of Doppler ultrasonography has been used to evaluate the marginal perfusion of the corpus luteum (CL), as a method of early gestational diagnosis (21 days), which is the objective of the study. 57 nelore cows were used, which at 21 days after IATF were submitted to early diagnosis by Doppler ultrasonography. The study was developed in a completely randomized design. The measurements of the corpus luteum were compared using the Mann Whitney test. The presence or absence of CL in the right and left ovaries was compared using the Chi-Square Test. A 0.05 level of significance was adopted for all tests. Upon ultrasound examination, of the 57 synchronized and inseminated cows, 21 known pregnant, and 36 not pregnant. Of the 57 endorsed, 8 did not ovulate. There was a statistical difference between pregnant and not pregnant, for total area of CL, internal perfusion of the CL and total perfusion of the CL. It was possible to conquer that a Doppler ultrasonography, evaluating the total area of the corpus luteum, together with a blood perfusion, is efficient in the diagnosis of early gestation (21 days) of pregnant and empty nelore cows.