However, the rate at which obesity is increasing suggests that environmental and behavioral influences, rather than genetic changes, have fueled the epidemic. In this context, it is of particular relevance that epidemiological and experimental studies have highlighted a relationship between the periconceptual, fetal and early infant phases of life and the subsequent development of adult adiposity.
This relationship; the "developmental origins of health and disease" (DOHaD) model, speculates that the fetus adapts to adverse environmental cues in utero with permanent readjustments in homeostatic systems to aid survival. However, these adaptations, known as predictive adaptive responses, may ultimately be disadvantageous in postnatal life and may lead to an increased risk of chronic non-communicable disease in adulthood.