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 sleeping baby. A baby is a very young human who is born after a mother gives birth. A baby is called a newborn for the first 1 to 3 months of life. They are then called a child until about the age of three years old, and a preschooler between 3 years old and school. An infant is a human child at the youngest stage of life.