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
Puberty: Puberty generally starts earlier for girls, some time between 8 and 13 years of age. For most girls, the first evidence of puberty is breast development, but it can be the growth of pubic hair. As her breasts start to grow, a girl will initially have small, firm, tender lumps .