EVALUATION OF FOETAL DEVELOPMENT IN SANTA INÊS SHEEP USING ULTRA-SOUND
DOI:
https://doi.org/10.5216/cab.v8i3.1731Keywords:
Ovinos, reprodução, gestaçãoAbstract
Thirty two Santa Inês ewes were synchronized and bred, resulting in 18 pregnancies. These were use to inves-tigate the reliability of developmental parameters in the estimation of gestational age. The ultra-sound evaluations were carried out from day 8 to 55 of pregnancy, with day zero being the first day of breeding. For positive pregnancy diagnosis the visualization of the fetus and heart beat were considered. Gestational age was determined using: cranial-caudal length (CCC), biparietal diameter (DBP), thoracic diameter (DT), and measurements of the gestational sac. All parameters had a positive correlation with gestational age, especially DBP which was more reliable and easier to measure. In addition, growth equations were calculated to determine gestational age from the measurements. In terms of methods of carrying out the ecograph, the trans-rectal route was more practical up to 45 days after service. After this the transabdominal route was seen to be more adequate.
KEY-WORDS: Age, ewe, fetal measuring, gestational.
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