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==Key Stage 3==
===Meaning===
The [[ovary]] is an [[organ ]] in the [[Female Reproductive System|female reproductive system]] which produces and stores the [[Ovum|egg cells]].
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: The '''ovaries''' release one [[ovum]] every 28 days.
: Each [[ovary]] takes a turn to release the [[ovum]] each month, but in some [[female]] humans both '''ovaries''' release an [[ovum]] at the same time which can lead to [[Fraternal Twins|twins]].
==Key Stage 4==
===Meaning===
The '''ovaries''' are [[organ]]s in the [[Female Reproductive System|female reproductive system]] and [[Endocrine Gland|endocrine glands]] in the [[Endocrine System|endocrine system]].
===About Ovaries in the Female Reproductive System===
: The '''ovaries''' are where the [[Ovum|ova]] are stored.
: During the [[Menstrual Cycle|menstrual cycle]] [[Follicle Stimulating Hormone|follicle stimulating hormone]] causes a [[follicle]] in the [[ovary]] grow and a single [[ovum]] to mature.
: [[Luteinizing Hormone]] causes the [[ovum]] to be released from the [[follicle]].
===About Ovaries as Endocrine Glands===
: '''Ovaries''' [[secrete]] [[oestrogen]] which causes the expression of female characteristics during puberty including the widening of the hips, [[Mammary Gland|breast]] growth and the initiation of the [[Menstrual Cycle|menstrual cycle]].