The following glossary is adapted from the glossary provided by Planned Parenthood at https://www.plannedparenthood.org/learn/glossary.
Wet dreams: Erotic imaging during sleep that causes ejaculation in men and lubrication in women. See “nocturnal emission.”
Withdrawal: Pulling the penis out of the vagina before ejaculation in order to avoid pregnancy. A reversible, behavioral method of birth control.
X chromosome: The sex-differentiating chromosome that occurs twice in females and once in males.
Y chromosome: The sex-differentiating chromosome that occurs once in males and does not occur in females.
Yeast infection: Usually, a type of vaginitis caused by an overgrowth of the yeast, Candida albicans. Yeast infections may also occur in the penis or scrotum. When they occur orally, they are referred to as “thrush.”
Zygote: The single-celled organism that results from the joining of the egg and sperm.
Zika: A virus that’s spread through mosquito bites and through the semen of an infected person. Most people who get Zika have no symptoms or ones that are very mild. In pregnancy, Zika can cause serious problems including miscarriage, babies being born with brain and eye problems, smaller than normal heads, and developmental problems.