Scientists have performed an analysis of epigenetic marks on DNA to measure how much a baby’s development in the womb is determined by the genes inherited from the parents, as compared with the mother’s nutrition, mental health and lifestyle. The baby’s epigenetic profile was determined using infinium array technology and a million potential inherited genetic polymorphisms were measured. Epigenetics refers to the complex set of reactions that control the development and maintenance of plants and animals by switching parts of the DNA on and off at strategic times and locations.