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青春期以生长迅速、具有成人体型和生物节律为特征。铁的总需求量从青春期前的 0 .7mg/ d～ 0 .9mg/ d达到 2 .2 mg/ d,对月经过多的青春期女性可能需要更多的铁。这一铁需求的增加与青春期不同阶段、青春期身体增长的大小以及性成熟和月经到来有关。青少年铁摄入的有关资料表明 :由于铁摄取量平均为1 0 mg/ d～ 1 1 mg/ d,因而青春期女性在这一时期不可能获得充足的铁储备。育龄期年轻女性低铁储备使得她们在孕期易患缺铁性贫血 ,在多数情况下每日膳食摄取的铁不能满足孕期铁的需求
Adolescence is characterized by rapid growth, with adult size and biorhythm. The total iron requirement from pre-puberty of 0. 7mg / d ~ 0.9mg / d to 2.2 mg / d, adolescent menome women may need more iron. This increase in iron demand has been linked to different stages of adolescence, the growth of adolescence, physical maturity and the onset of menstruation. Adolescent iron intake data show that: due to an average iron intake of 10 mg / d ~ 1 1 mg / d, so adolescent women during this period can not be sufficient iron reserves. Females of young age at childbearing age make them susceptible to iron deficiency anemia during pregnancy, and in most cases the daily dietary intake of iron does not meet the demand for iron during pregnancy