Teens may be much more diverse in their gender identities than widely thought, a new study suggests.
In a survey of nearly 3,200 high school students in one U.S. school district, researchers found that almost 10% were "gender-diverse." That meant they identified as a gender other than the sex on their birth certificate.
Often, those kids identified as transgender, but many considere...
Kids who reach puberty earlier than other kids are at an increased risk of harming themselves as teens, British researchers report.
"Our study is the first to investigate the relationship between the timing of puberty and self-harm using an objective measure of pubertal timing in boys," said lead author Elystan Roberts, a researcher at the University of Bristol.
Girls are entering puberty about a year earlier than they did back in the 1970s, according to global data on breast development.
The age of breast development -- which represents the first clinical sign of female puberty -- has declined an average three months per decade between 1977 and 2013, according to analysis of data combined from 30 different studies.
Older women who started menstruating at an early age have an increased risk of high blood pressure, new research suggests.
For the study, scientists analyzed data from nearly 7,900 women in China. The investigators found that early-onset menstruation was linked to a much higher chance for high blood pressure in late adulthood, even after taking into account factors such as social and...