For girls, the age of puberty has been falling since the 19th century. The same period has seen a similar decline for boys (source) In the United States and other Western countries, girls have been reaching puberty at earlier and earlier ages. A recent longitudinal study has examined this trend in white Americans born between... Read More

Whom will she choose? (source) There has been much talk about two findings from a recent study: (a) boys reach puberty at different ages in different ethnic groups and (b) boys are reaching puberty earlier now than in the recent past. The first finding is in line with previous studies: The second finding is new:... Read More