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| style="height:20px; width:400px; text-align:center;" |A diagram of the '''female reproductive system'''.

|}

: There are two '''ovaries''' in a [[female]].

: 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]].