Animal models are used with increasing numbers in the late LO phase and particularly in the candidate selection phase for pharmacokinetic/pharmacodynamic (PK/PD) and efficacy, and then also used in regulatory required safety studies. Therefore, there are opportunities throughout the drug discovery process to incorporate more translationally predictive cellular models, or CIVMs, to both reduce animal use aligned to our 3Rs commitment (replacement, reduction, and refinement) and provide data that better translate to the clinic, which ultimately results in better medicines for patients.