what determines your gender?
<answer> Someone born with a penis will be a boy and someone with a vulva will be a girl. <context> We assign a newborn’s sex as either male or female*, based on their genitals. Once a sex is assigned, we presume the child’s gender. Someone born with a penis will be a boy and someone with a vulva will be a girl. For many people, this is cause for little, if any, concern or further thought.