Fefer , G., Lerer , A., First , E., Yeager , A., Diel de Amorim , M. and Cheong , S.H. 2018. Accuracy of whelping date calculator based on fetal ultrasonographic measurements. Clinical Theriogenology. 10, 3 (Sep. 2018), 312. DOI:https://doi.org/10.58292/ct.v10.10000.