TY - JOUR T1 - Ultrasonographic features of the uterus and ovaries in Holstein-Sahiwal crossbred dairy heifers at different phases of the estrous cycle JF - The Philippine Journal of Veterinary Medicine A1 - Ponco, Kristine Ysabel Y. A2 - Pajas, Arville Mar Gregorio A. A2 - Rayos, Antonio A. LA - English YR - 2021 UL - https://tuklas.up.edu.ph/Record/IPP-00000656827 KW - Veterinary ultrasonography KW - Heifers ER -