A period is a release of blood from a girl's uterus, out through her vagina. It is a sign that she is getting close to the end of puberty. It also means that she can get pregnant if she has sex. …

As people pass from childhood into their teen years and beyond, their bodies develop and change. So do their emotions and feelings. During the teen years, the hormonal and physical …

A period is when blood comes out through a girl's vagina. It is a sign that she is getting close to the end of puberty. Puberty is when your body goes from looking like a kid's into looking more …

Puberty (say: PYOO-ber-tee) is the name for the time when your body begins to develop and change as you move from kid to adult. We're talking about stuff like girls developing breasts …

An erection is when the penis gets hard because sponge-like tissue in it fills with blood. Erections tend to make the penis get bigger and stand away from the body. Erections can go away on …

Doctors usually can’t tell if someone has been masturbating (touching or rubbing their genitals because they like the way it feels). The only way doctors might know is if the area was irritated …

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When people masturbate, they touch or rub their own genitals because they like the way it feels.This won’t stunt their growth (keep them from getting taller) or cause any health …

A lot of changes happen as you grow up, especially as you reach puberty (say: PYOO-bur-tee). This is the time when your body begins to develop and change. During puberty, t here isn't just …

KidsHealth is the #1 most-trusted source for physician-reviewed information and advice on children's health and parenting issues. For parents, kids, teens, and educators, in English and …