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Physical maturity definition

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Find information on medical topics, symptoms, drugs, procedures, news and more, written in everyday language.

See also Health Supervision of the Well Child. During adolescence usually considered age 10 to the late teens or early 20sboys and girls reach adult height and weight and undergo sexual maturation puberty.

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The timing and speed with which these changes occur vary and are affected by both heredity and environment. For height and weight charts for children 2 years of age and older, see growth charts from the Centers for Disease Control and Prevention CDC. There is Physical maturity definition growth spurt during adolescence. The growth spurt in Physical maturity definition occurs during mid-adolescence between the ages of 12 years and 17 years and usually begins a year after the testes start enlarging.

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Boys grow about 4 inches about 10 centimeters during their year of maximum growth. In general, boys become heavier and taller than girls.

If the timing of growth is not typical, particularly in a boy whose physical development is delayed or a girl whose development occurs early, emotional stress is likely. Most boys who grow slowly eventually attain normal height see Constitutional Delay of Puberty. However, adolescents Physical maturity definition growth is delayed or abnormal see Short Stature in Children should be evaluated by doctors to rule out diseases and other physical causes and be Physical maturity definition reassurance.

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Sexual maturation or puberty begins at different ages depending on Physical maturity definition and environmental factors. Sexual maturity begins earlier today than a century ago, probably because of improvements in nutrition, general health, and living conditions. For example, the average age that girls begin menstruating has decreased by about 3 years over the past years. However, whenever sexual maturation begins, it typically occurs in the same order.

In boys, sexual changes begin with enlargement of the scrotum and testes, followed by lengthening of the penis see Puberty in Boys. Next, pubic hair appears.

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Armpit and facial hair appears about 2 years after pubic hair. The growth spurt usually begins a year after the testes start enlarging.

Young adolescent boys often have slight enlargement of the breasts gynecomastia that usually resolves within several years. In most girls, breast budding is the first sign of sexual maturation, followed Physical maturity definition by the start of the growth spurt see Puberty in Girls. Shortly after that, pubic and armpit hair appears.

Menstruation typically begins about 2 years after breast development starts and when growth in height slows after reaching its peak Physical maturity definition.

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In the United States, most girls start their period at 12 or 13 years of age, Physical maturity definition there is a wide range. This appearance may be a normal variation but should be discussed with a doctor.