Ultra-sonografia bidimensional convencional, de alta resolução e tridimensional no acompanhamento da gestação em cadela Two-dimensional conventional, high resolution two-dimensional and three-dimensional ultrasonography in the evaluation of pregnant bitch

<abstract language="eng">Gestational period in a bitch, after natural mating with a normal dog, was evaluated by two-dimensional conventional, high-resolution two-dimensional and three-dimensional ultrasonography. High-resolution two-dimensional ultrasonography show better image and provides early diagnosis of pregnancy (15 days) in comparison to conventional one (20 days). Three-dimensional ultrasonography was use to evaluate fetal morphology during late gestation period, however its application is still limited