What physical characteristic is noted at Tanner stage I for both sexes in terms of pubic hair?

At Tanner stage I, which is the prepubertal stage for both boys and girls, there is no pubic hair present. This stage reflects the initial phase of sexual maturity, indicating that the body has not yet entered the hormonal changes that stimulate the growth of pubic hair.

In understanding Tanner stages, it’s important to recognize that this staging system describes physical development through a series of defined stages, with Tanner stage I being characterized by the absence of secondary sexual characteristics. The growth of pubic hair typically begins at Tanner stage II, where individuals will see the first appearances of hair. Therefore, identifying no pubic hair as the characteristic of Tanner stage I accurately represents the body’s development during this early phase of adolescence.