The main twentieth-century trend regarding puberty is that:
A) girls cannot become pregnant now until later in puberty.
B) puberty is occurring at younger ages.
C) puberty now is occurring earlier for boys than for girls.
D) puberty is occurring more irregularly at different ages because of environmental pollution.

Question

Quizplus · Accepted Answer

Numerous studies have shown that puberty is occurring at younger ages in both boys and girls. This may be due to factors such as changes in diet, increased exposure to environmental toxins, and higher levels of obesity. Girls, in particular, are experiencing the onset of puberty at earlier ages, with many starting to menstruate as young as age 8 or 9.

The Main Twentieth-Century Trend Regarding Puberty Is That