Does the continuous improvement of human nutritional status lead to precocious puberty?

Parents often have the feeling that today's children are becoming more and more precocious physically. A new study from the Max Planck Institute for Demographic Research in Germany confirms that the age at which boys are sexually mature has dropped by an average of 2.5 months every 10 years since at least the mid-18th century.

Scientific research on human medical records has long confirmed that girls are getting menarche at an increasingly early age. However, previous studies on the age of sexual maturity of boys lacked comparable data. Goldstein indirectly filled this gap by studying male mortality curves by age groups in five European countries.

He said that on the mortality curve of male age groups in almost all ethnic groups in mankind, a so-called "accidental death peak" appears at a specific stage of boy puberty. The reason for this phenomenon is that at this stage, boys 'hormone secretion reaches their peak. At this time, boys tend to act recklessly and the chance of accidental death increases. The "peak period of accidental deaths" reaches its peak when boys change their voices and become fertile in late adolescence. Using statistics similar to the characteristics of girls 'menarche anal vibrator , the researchers indirectly deduced that boys' physiological maturity was getting earlier and earlier.

Goldstein believes that the main reason why men and women are sexually maturing earlier is the continuous improvement of human nutritional status.

The result of the above phenomenon is that the time difference between young people's physiological maturity but their social age is not yet mature. The Max Planck Institute for Demography points out that demographic research shows that over the past half century, people have married, have children, start careers remote vibrator best penis pump , and are no longer financially dependent on their parents at an increasing age. The life stages of young people who are sexually mature but have no children are getting longer and longer. The institute did not analyze the social impact of this trend in detail, only pointing out one point: At least now, the period when people need to make important decisions in life is getting farther and farther away from the period of juvenile recklessness.

Adolescent weight affects fertility

As we all know, obesity or underweight adults can easily cause fertility problems. Among them, obesity can also increase the risk of complications during pregnancy. However, surveys have shown that underweight or overweight teenagers have fewer children than normal-weight people in adulthood.

Earlier small vibrator , researchers at the University of Helsinki in Finland collected data on nearly 1300 Finnish men and women (tracked and collected since 1980). When the study was launched, the respondents were between 3 and 18 years old. The researchers mainly collected the subjects 'body mass index (BMI) during puberty.

Research published in the recently published issue of the journal Epidemiology stated that compared with those with normal body mass index during puberty, 10% to 16% of adults with underweight during adolescence have poorer fertility; among obese people, 32% to 38% have fewer children than normal people.

Researchers say the BMI index has a profound impact on human development. For women, a low BMI can disrupt the menstrual cycle, while obesity can cause fertility problems, such as polycystic ovary syndrome.
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