Glossary

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A B C D E F G H I J L M N O P R S T U V W Y

oral

Sex involving the mouth.

orchitis

Inflammation of a testis (see Male Anatomy).

ovarian cyst

Fluid-filled sac that develops in the ovary or on its surface. Usually disappears on its own but may rupture and cause pain and complications.

ovaries

A pair of female sex glands that store and release ova (see ovum) and produce the sex hormones estrogen and progesterone (see Female Anatomy).

ovulation

The release of an ovum from an ovary.

ovum

Reproductive egg cell produced by the ovaries.