obesity: Body Mass Index for adultsEncyclopÃ¦dia Britannica, Inc.Obesity was traditionally defined as an increase in body weight that was greater than 20 percent of an individualâs ideal body weightâthe weight associated with the lowest risk of death, as determined by certain factors, such as age, height, and gender.
Define infancy: early childhood; a beginning or early period of existence; the legal status of an infant â infancy in a sentence early childhood; a beginning or early period of existence; the legal status of an infantâ¦ See the full definition
a human infant from the time of birth through the 28th day of life. At birth, the gestational age and birth weight are assessed and the newborn classified accordingly, for example, large for gestational age, preterm (premature), or low birth weight. Also called neonate, newborn infant. (nÄ'Å-nÄ'tÄl)