Sample<unk>  for use with American boys from birth to age 36 months. A<unk>  is used by pediatricians and other health care providers to follow a child's<unk>  over time.<unk> s have been constructed by observing the<unk>  of large numbers of healthy children over time. The height, weight, and head circumference of a child can be compared to the expected parameters of children of the same age and sex to determine whether the child is growing appropriately.<unk> s can also be used to predict the expected adult height and weight of a child because, in general, children maintain a fairly constant<unk>  curve. When a child deviates from his or her previously established<unk>  curve, investigation into the cause is generally warranted. Parameters used to analyze<unk> s include weight velocity (defined as rate of change in weight over time), height velocity (defined as rate of change in stature over time), and whether someone's<unk>  crosses percentiles. For instance, endocrine disorders can be associated with a decrease in height velocity and preserved weight velocity while normal<unk>  variants are associated with a decrease in height and weight velocity that are proportional to each other. It's important to note that other parameters are more commonly used such as waist circumference for assessing obesity and skin fold difference for assessing malnutrition.<unk> s can also be compiled with a portion of the population deemed to have been raised in more or less ideal environments, such as nutrition that conforms to pediatric guidelines, and no maternal smoking.<unk> s from these sources end up with slightly taller but thinner averages.<unk>  curve of a girl, compared to the 2006 WHO curves.<unk> s are different for persons assigned male at birth and female at birth, due in part to pubertal differences and disparity in final adult height. In addition, children born prematurely and children with chromosomal abnormalities such as Down syndrome and Turner syndrome follow distinct<unk>  curves which deviate significantly from children without these conditions. As such,<unk> s have been created to describe the expected<unk>  patterns of several developmental conditions. Since there are differences in normal<unk>  rates between breastfed and formula-fed babies, the World Health Organization<unk> s, which better reflect the<unk>  pattern of the healthy, breastfed infant are considered the standard for U.S. children under age two.
Growth chart
Birth control
Birth control 
PhenX Toolkit
Partogram
Apgar score
Maternal mortality ratio
Morning report 