File photo: American researchers used a complex series of steps to engineer "male eggs" to be carried by female mice.

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Scientists have created mice with two fathers – raising the possibility of gay couples having children who are genetically their own.

In experiments hailed as a 'new form of mammalian reproduction', American researchers used a complex series of steps to engineer 'male eggs' to be carried by female mice.

The creatures were then mated with normal males – leading to the creation of pups with two fathers.

The geneticists behind the controversial technique said it could potentially be used to improve livestock breeds or preserve endangered species. More provocatively, they claim that if the technique can be refined, 'someday two men could produce their own genetic sons and daughters'. ...

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美科學家使兩雄鼠“生”寶寶 同性戀生殖有望

?????? 據《每日郵報》報道，美國科學家首創以干細胞技術使兩只雄性老鼠產生后代。科學家表示這項新突破可幫助保育瀕臨絕種的動植物，甚至有一天能幫助男同性戀情侶擁有自己的孩子。

?????? 據今天刊載于《生殖科學期刊》的研究表示，美國德州大學的癌癥治療中心研究所的科學家成功操控雄性（XY染色體）老鼠胚胎細胞，發展出“誘發性多功能性干細胞”細胞株。

?????? 這些干細胞就是所謂的已接受過基因重編，以便成為類胚胎干細胞狀態的成人細胞。部分從新細胞株成長出來的細胞會直接失去Y染色體，成為XO細胞。

?????? 這些XO細胞注入到雌性老鼠胚胎并移植到代理孕鼠體內后，就會生下帶有原先雄性老鼠X染色體的幼鼠。這些幼鼠長大與正常的雄性鼠交配后，生下的幼鼠無論雄性或雌性，都帶有原先2位鼠爸爸的基因。