Word Origin and History for corrugated Expand. adj. 1620s, wrinkled (of skin, etc.), past participle adjective from corrugate. Meaning bent into curves or folds (of iron, cardboard, etc., for elasticity and strength) is from 1853.
on average girls start puberty between the ages of 9 and 14 but some will start to develop breasts or pubic hair by age 8 and a small number will start to mature before age 7the technical term for this is precocious pubertygirls are five times more likely than boys to develop precocious pubertyn average girls start puberty between the ages of 9 and 14 but some will start to develop breasts or pubic hair by age 8 and a small number will start to mature before age 7
Changes in Girls. The onset of sexual maturation in girls usually begins about two years earlier than it does in boys. The process of puberty can take anywhere from two to six years and can begin anytime between ages 8 and 14. (If a girl begins developing before age 8, puberty is considered to be premature, and a doctor should be consulted.). An increase in height usually begins at age 10 to 11 and continues to age 15 to 16.