Childbirth is a major life event with implications for family health, but it has been understudied by psychological scientists. The biopsychosocial model, which posits that health is shaped by biological, social, psychological, and cultural processes, can describe birth. The physiology of birth involves the interplay of hormones such as cortisol and oxytocin that are known to be affected by socioemotional factors. Existing theories on pain, stress, and social support can be applied to birth. Psychologists can adapt and incorporate empirically supported treatments, such as cognitive-behavioral therapy and mindfulness-based stress reduction, into childbirth education. Although father presence at birth represents a relatively new phenomenon, research on partner support has been lacking. Birth experiences may mediate associations between prenatal stress and postpartum adjustment, suggesting a need for more integrated, longitudinal research on birth.