Dr. Thorsten Boroviak is an Assistant Professor at the University of Cambridge and a member of the Cambridge Stem Cell Institute. He discusses how stem cell–based embryo models are helping researchers study early human and primate development, including implantation and gastrulation. He also talks about using primate systems such as marmoset to understand human development, the role of biomechanics and extraembryonic tissues in embryogenesis, and the ethical considerations surrounding embryo models and emerging technologies like in vitro gametogenesis.