the cost of successful adolescent growth and development in relation to iron and vitamin a sta tus. "
Answers
The role of iron and vitamin A in adolescent growth and development is not well described. During adolescence iron requirements are increased, reaching a maximum at peak growth, but after menarche, menstrual iron loss must also be replaced. An observed rise in retinol-binding protein concentrations at puberty level 4 indicates a role for vitamin A in sexual maturation. Iron and vitamin A deficiencies may slow the tempo of growth. Conversely, for girls on marginal diets, an extended catch-up growth period may lead to depletion of these nutrients. The costs of achieving growth may also include cephalopelvic disproportion in girls becoming pregnant and increased risk of menorrhagia.
Iron and Vitamin A has the most important role of adolescent growth as well as development.
During the adolescence iron requirements have been widely increased with reaching the maximum at peak growth as well as menstrual iron loss are replaced.
Retinol-binding protein concentrations mainly rises in the puberty level 4 so that it would mainly indicates the role for the vitamin A in sexual maturation.