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Usually those with testes can produce sperm, and those with ovaries produce ova—but not always.—Agustín Fuentes, Scientific American, 25 Feb. 2025 The bill defines a female as someone whose reproductive system produces ova, and a male as someone whose reproductive system can fertilize ova.—Sarah Swetlik | Sswetlik@al.com, al, 24 May 2023 But even so, most bodily systems overlap extensively across large (ova) and small (sperm) gamete producers, and the patterns of physiology and behavior in relation to birth and care of offspring are not universal across species.—Agustín Fuentes, Scientific American, 1 May 2023 For example, in many mammal species, ova producers do most of the infant care.—Agustín Fuentes, Scientific American, 1 May 2023
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