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Human growth hormone derived from cadavers was linked to Alzheimer's disease in five patients who received injections decades ago, a study in Nature Medicine finds.
Several studies suggest that the number of girls starting puberty early has more than doubled amid the coronavirus outbreak - and experts are unsure exactly why
Studies have confirmed, in dozens of countries, that the age of puberty in girls has dropped by about three months per decade since the 1970s. A similar pattern, though less extreme, has been observed in boys. It's unclear why.
Arcia Herman-Giddens first realized something was changing in young girls in the late 1980s, while she was serving as director for the child abuse team at Duke University Medical Center in Durham, North Carolina. During evaluations of girls who had been abused, Herman-Giddens noticed that many of them had started developing breasts as young as 6 or 7.
Puberty starts earlier than it used to. No one knows why