Cellular Communication in Development, Volume 169 provides a comprehensive overview of the intricate signaling pathways and molecular mechanisms that govern how cells communicate during the development of multicellular organisms. This volume explores the essential roles of cell-to-cell communication in processes such as embryogenesis, tissue patterning, organ formation, and differentiation. Specific chapters include Specification of pgcs, Establishing and maintaining gonadal cell fate, Role of retinoic acid in meiosis, Assembly of primordial follicles, Activation of primordial follicles, Mechanisms of germ-soma communication during follicular growth, Somatic regulation of oocyte meiotic arrest and resumption, Ovarian stroma/function/role in aging, and much more. Additional sections explore New approaches to supporting follicle growth/ovarian function in vitro, Cancer therapy - effects on survival/development of oocyte/follicle, Female germ cells from somatic cells, Spermatogenic stem cell niche, Role of macrophages in testis function, Male germ cells from somatic cells, and more.