Kasimanickam R, Abdel Aziz RL, Kasimanickam V, Formen C. Calving date prediction based on transrectal ultrasonography determination of gestational age in beef cattle. CT [Internet]. 2017Dec.1 [cited 2025Feb.15];9(4):573-82. Available from: https://clinicaltheriogenology.net/index.php/CT/article/view/10006