Acompanhamento ultrassonográfico do desenvolvimento embrionário e fetal em caprinos da raça moxotó

Abstract

This paper aims to evaluate the embryo-fetal development in Moxotó breed animals by using fetal measurement in order to obtain more informations about measures and breed standards. Tests were performed every seven days during the first 60 days of pregnancy to evaluate embryonic vesicle, HR, head/torso differentiation, placentons, umbilical cord, CRL, BPD, TD and AD. After 60 days, the tests were carried out every 14 days, evaluating the following parameters: placentons, crown-rump length (CRL), biparietal diameter (BPD), thoracic diameter (TD), abdominal diameter (AD), vertebral column and femur length. In this study it was possible to correlate TD/placentons (r=0,94), BPD/CRL (r=0,97), TD/BPD, AD/TD, CRL/placentons, BPD/placentons and TD/CRL (r=0,99). The means and standard errors for nulliparous and primiparous females were also compared, as well as for single pregnancy and twin pregnancy animals, but no statistical difference was found. According to the findings, it is possible to state that there was a high correlation between crown-rump length (CRL), placentons, biparietal diameter (BPD), thoracic diameter (TD) and abdominal diameter (AD) during gestation. In addition, it is possible to state that the high correlation between placentons and gestational age allows for its use as a parameter for the determination of the fetal age in Moxoto breed goats, especially when it comes to animals at an advanced gestational age, when it is difficult to obtain images of fetal structures due to its size.