Alejandro Aguilera Castrejon is the principal investigator at the Aguilera Castrejon Lab at the Howard Hughes Medical Institute Janelia Research Campus. His research focuses on mammalian embryogenesis, with a particular interest in gastrulation and the patterning of organs and tissues. Alejandro develops innovative platforms for growing natural and stem cell-derived mouse embryos outside the uterine environment to study both normal and disrupted development.