Pivotal periods for pregnancy loss during the first trimester of gestation in lactating dairy cows - Wiltbank, Milo C; Baez, Giovanni M; Garcia-Guerra, Alvaro; Toledo, Mateus Z; Monteiro, Pedro L.J; Melo, Leonardo de França; Ochoa, Julian C; Santos, José E.P; Sartori, Roberto (Theriogenology, 2016)