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Pubertal Age has Fallen among Danish Children

by Mohamed Fathima S on November 27, 2018 at 2:46 PM
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Pubertal Age has Fallen among Danish Children

The age at which children attain puberty has fallen in many Western countries including Denmark. The study was performed by the Department of Public Health at Aarhus University, Denmark.

"The study showed that daughters had their first menstrual period three months earlier than their mothers," says PhD student Nis Brix, who is one of the researchers behind the study, which has just been published in the international journal Paediatric and Perinatal Epidemiology.

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How old girls are when they have their first menstruation is one of the most often studied milestones for puberty in girls. Boys also reached several benchmarks for puberty six months to a year earlier than they did just fifteen years ago. For example, their voices broke a year earlier than reported in the most recent Danish study.

In the study, the researchers used information about puberty from 14,759 children from "the Danish National Birth Cohort". The children answered a total of 73,160 six-monthly questionnaires about their pubertal development from the age of 11.5 years.
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The girls were asked about breast development, pubic hair, their first menstruation, acne and armpit hair, while the boys were asked about whether their voice had broken, their first ejaculation, pubic hair, acne and armpit hair. Based on this information, the researchers were able to calculate the age at which the pubertal milestones were achieved.

Nis Brix emphasises that the results cannot stand alone but should be seen in light of previous Danish studies.

"Especially in the case of the boys, the fall of six months to a year is uncertain, as previous Danish studies have collected puberty information differently than in our study. If we take all previous Danish studies and our new study together, they all point in the same direction, which is towards earlier pubertal development for both boys and girls," explains Nis Brix.

The researchers behind the study are now attempting to find out whether the explanation for the fall in the age of puberty should already be found in the foetal stage. If they succeed, it will be possible to aim to prevent early puberty, something that might also help to prevent complications later in life.

"A falling age of puberty is worrying, as early puberty may be connected with an increased risk of a number of diseases as adults, such as obesity, diabetes, cardiovascular diseases and certain types of cancers," says Nis Brix.



Source: Eurekalert
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