Classifications of Ages According to the World Health Organization (WHO)
The World Health Organization (WHO) provides a comprehensive framework for classifying ages, which is widely used across the globe. Understanding these classifications can help in various fields, including healthcare, education, and social services. Let’s delve into the different age groups defined by the WHO.
Infancy
Infancy is the period from birth to 1 year of age. During this stage, children undergo rapid physical and mental development. The WHO recognizes this critical phase by categorizing it as follows:
| Age Group | Description |
|---|---|
| Newborn (0-28 days) | This period is characterized by adaptation to the external environment, including feeding, temperature regulation, and sensory development. |
| Infant (1-11 months) | Infants continue to grow and develop motor skills, language, and social interactions. They also begin to explore their surroundings. |
| Toddler (12-23 months) | Toddlers experience significant growth in their physical abilities, such as walking and running. They also start to develop independence and self-control. |
Early Childhood
Early childhood spans from 1 to 4 years of age. This period is marked by rapid cognitive, social, and emotional development. The WHO categorizes early childhood into the following age groups:
| Age Group | Description |
|---|---|
| Preschool (1-4 years) | Preschoolers begin to develop a sense of self and their place in the world. They learn basic social skills, language, and cognitive abilities. |
Early Adolescence
Early adolescence is the period from 10 to 14 years of age. During this time, individuals experience significant physical, emotional, and social changes. The WHO recognizes the following age groups within early adolescence:
| Age Group | Description |
|---|---|
| Early Adolescence (10-14 years) | This stage is characterized by rapid physical growth, hormonal changes, and the development of identity and self-esteem. Social interactions and peer relationships become increasingly important. |
Adolescence
Adolescence spans from 15 to 19 years of age. It is a period of significant physical, emotional, and social changes. The WHO defines adolescence as follows:
| Age Group | Description |
|---|---|
| Adolescence (15-19 years) | Adolescents continue to experience physical and emotional changes, as well as the development of their identity and independence. They also begin to explore their roles in society and their future career paths. |
Young Adulthood
Young adulthood is the period from 20 to 24 years of age. It is a time of significant personal and professional growth. The WHO categorizes young adulthood as follows:
| Age Group | Description |
|---|---|
| Young Adulthood (20-24 years) | This stage is characterized by the establishment of personal relationships, career development, and the pursuit of personal goals. Individuals often experience a sense of freedom and independence. |
Adulthood
Adulthood spans from 25 to 64 years of age. It is a time of continued personal and professional growth, as well as the assumption of responsibilities. The WHO defines adulthood as follows:
