In most species, long-held notions of motherhood, fatherhood and monogamy are being questioned, with evidence showing that even females presumed to be monogamous mate with more than one male during their reproductive cycle. Only recently have scientists observed the intriguing tactics used in the battle to ensure that a males sperm reaches the female egg and not a competing male's sperm
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Title from resource description page (viewed July 10, 2014)
