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X-ray of a left hand, with automatic calculation of bone age by a computer software. Bone age is the degree of a person's skeletal development. In children, bone age serves as a measure of physiological maturity and aids in the diagnosis of growth abnormalities, endocrine disorders, and other medical conditions.
Skeletochronology is a technique used to determine the individual, chronological ages of vertebrates by counting lines of arrested, annual growth, also known as LAGs, within skeletal tissues. [1] Within the annual bone growth specimens, there are broad and narrow lines. Broad lines represent the growth period and narrow lines represent a growth ...
Sample growth chart for use with American boys from birth to age 36 months. A growth chart is used by pediatricians and other health care providers to follow a child's growth over time. Growth charts have been constructed by observing the growth of large numbers of healthy children over time.
For North American, Indo-Iranian (India, Iran) and European girls For North American, Indo-Iranian (India, Iran) and European boys Thelarche (breast development) age 10½ (8–13) Pubarche (pubic hair) age 11 (8½–13½) Growth spurt age 11¼ (10–12½) Menarche (first menstrual bleeding) age 12½ (10½–14½) Wisdom tooth eruption age 15½ ...
In children, the triradiate cartilage closes at an approximate bone age of 12 years for girls and 14 years for boys. [1] Clinical use
By doing this, doctors can track a child's growth over time and monitor how a child is growing in relation to other children. There are different charts for boys and girls because their growth rates and patterns differ. For both boys and girls there are two sets of charts: one for infants ages 0 to 36 months and another for ages 2 and above.
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The CDC growth reference charts define the normal range of growth as between the 5th and 95th percentiles. [ 4 ] While it is common for babies to shift percentiles during the first 2 years of life due to shifting from an intrauterine environment to one outside the uterus, shifting percentiles after 2 years of age may be the first sign of an ...