When it comes to talking about your child's genitals, stick to the terms you learned in health class: vagina, penis, testicles, uterus.
A euphemism suggests there is something to be embarrassed about, Schenectady, N.Y., pediatrician Patricia Hughes says. "Everyone has their own parenting style, but the more comfortable you are, the more comfortable the child will be."
Hughes recommended looking to nature when a child wants to know why their body is different than mom or dad. A female duck looks different than a male duck, for example.