Infants grow rapidly reaching approximately half their adult height by the time they are two years old. At around one year old infants can walk and by the age of two they can run.
Early Childhood (3-8)
Children continue to grow at a steady pace. They continue to develop strength and coordination.
Adolescence (9-18)
Adolescents experience growth spurts. They develop sexual characteristics during puberty.
Early Adulthood (19-45)
Young adults reach the peak of their physical fitness.
Middle Adulthood (46-65)
The ageing process begins with some loss of strength and stamina. Women go through menopause.
Later Adulthood (65+)
The ageing process continues with gradual loss of mobility. Older adults will experience a loss of height of up to a dew centimeters.
Growth
An increase in some measured quantity such as height or weight.
Development
Complex changes including an increase in skills, abilities and capabilities.
Centile Lines
Lines on a graph used to show average measurements of height, weight and head circumference. They represent the values of the measurements taking into account age and sex.
Development norms
A description of an average set of expectations with respect to a young child's development. For example, by the age of 12 months a child has the ability to stand alone.
Milestone
An ability achieved by most children by a certain age. It can involve physical, social, emotional, cognitive and communication skills. For example, walking, sharing with others, expressing emotions, recognising familiar sounds and talking.
Gross Motor Skills
Large movements that involve using the large muscles of the body which are required for mobility. For example, rolling over.
Gross Motor Skills
Newborn
Primitive reflexes such as grasp
Gross Motor Skills
1 Month
Lifts chin, some control of head
Gross Motor Skills
3 Months
Can lift their head and chest when lying on their front
Gross Motor Skills
6 Months
Rolls over, can sit up for a short time without support, kicks legs when held up
Gross Motor Skills
9-10 Months
Crawls, begins to cruise (walking while holding on to objects)
Gross Motor Skills
12-13 Months
Stands alone, can walk without help
Gross Motor Skills
18 Months
Climbs onto furniture
Gross Motor Skills
2 Years
Propels a sit on toy with their feet, throws a large ball.
Gross Motor Skills
2 and a half years
Jumps from a low step, kicks a ball
Fine Motor Skills
Involve smaller movements that require more precise direction and use smaller muscles. For example, picking up a pencil.
Fine Motor Skills
Newborn
Holds their thumbs tucked into their hands
Fine Motor Skills
1 Month
Opens hands to grasp a finger
Fine Motor Skills
3 Months
Can briefly grasp a rattle
Fine Motor Skills
6 Months
Moves objects from hand to hand, can pick up dropped toys if they are in sight.
Fine Motor Skills
9-10 Months
Uses finger and thumb to hold a small object
Fine Motor Skills
12-13 Months
Manipulates and places toys
Fine Motor Skills
18 Months
Build a short tower with blocks
Fine Motor Skills
2 Years
Draws lines and circles, turns a page
Fine Motor Skills
2 and a half years
Uses a spoon and fork, builds a tower of 7-8 blocks
Adolescence
An important status change following the onset of puberty during which a young person develops from a child into an adult
Primary Sexual Characteristics
Female
The uterus enlarges and the vagina lengthens.
The ovaries behind to release eggs.
The menstrual cycle commences.
Primary Sexual Characteristics
Male
Enlargement of penis and testes.
Spontaneous erections caused by blood flowing into chambers in the penis may happen.
The testicles begin to produce spermatozoa (sperm) beginning of ejaculation.
Secondary Sexual Characteristics
Female
Breast develop and the areola swells and darkens.
Hair grows in armpits and pubic area.
Redistribution of body fat, causing hips to widen.
Secondary Sexual Characteristics
Male
Changes in larynx causing voice to deepen.
Hair grows in armpits and pubic are, facial hair.
Redistribution of muscle tissue and fat.
Puberty
A period of rapid growth during which young people reach sexual maturity and become biologically able to reproduce and secondary sexual characteristics develop.
Hormones
Chemical substances produced in the body and transported in the blood steam that control or regulate body cells or body organs.
Menopause
The ending of female fertility, including the cessation of menstruation and reduction in production of female sex hormones.
Life Expectancy
An estimate of the number of years on average, that a person can expect to live. Sometimes called longevity.