Girls are usually completely physically mature by _____ years old.
puberty is the time in life when a young person starts to become sexually mature in girls puberty usually starts around 11 years of age but it may start as early as 6 or 7 years of agein boys puberty begins around 12 years as age but may start as early as 9 years of age puberty is a process that goes on for several years most girls are physically mature by about 14 years of agen girls acne usually starts around 13 years of age menstruation the period usually happens last in boys the testicles and the penis get bigger first then hair grows in the pubic area and the armpits