Abstract
In the past four decades, obstetric and neonatal care practices have changed dramatically throughout the western world. As a result, humans now confront unprecedented situations for which they have no biological preparation or cultural experience. In these special issues, an integrated view of the evolving practices of birthing and infant care are discussed from a variety of perspectives. Contributors attempt to show how understanding of the biomedical and psychosocial issues can be informed by cross-cultural and cross-species evidence concerning birth management, neonatal care, and early development. The individual contributions are summarized in this introductory article