多明尼加遺傳病 青春期女變男 – 中時電子報
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多明尼加遺傳病 青春期女變男
2015年09月22日 04:10
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在中美洲加勒比海島國多明尼加偏遠村落裡,有些孩子出生時身體結構像女生,看不到陰莖或睪丸,而是類似陰道的生殖器。但是約莫到了12歲青春期,體內分泌大量睪丸激素,這些「女生」的男性生殖器才會開始成形,由少女變成少男。據英國廣播公司(BBC)網站報導,1974年紐約康乃爾醫學院教授麥金利女士首次發現這種遺傳性疾病,稱這些男孩出生時沒有男性生殖器,係因缺乏5-alpha還原酶,無法將睪丸素轉為雄性激素。
多明尼加遺傳病 青春期女變男 - 中時電子報
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多明尼加遺傳病 青春期女變男
2015年09月22日 04:10
中國時報 鍾玉玨/綜合報導
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在中美洲加勒比海島國多明尼加偏遠村落裡,有些孩子出生時身體結構像女生,看不到陰莖或睪丸,而是類似陰道的生殖器。但是約莫到了12歲青春期,體內分泌大量睪丸激素,這些「女生」的男性生殖器才會開始成形,由少女變成少男。據英國廣播公司(BBC)網站報導,1974年紐約康乃爾醫學院教授麥金利女士首次發現這種遺傳性疾病,稱這些男孩出生時沒有男性生殖器,係因缺乏5-alpha還原酶,無法將睪丸素轉為雄性激素。
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在多國西南部薩利納斯(Salinas),這些「女變男」的孩子被稱為Guevedoces,意為「12歲長陰莖」。以24歲男村民強尼(Johnny)為例,他雖然生理上是男性,但出生時並未長陰莖,並一直被父母當女孩養。他說,自己從不喜歡作女生打扮,只喜歡和男孩玩,現在終於覺得自己是個男人。內分泌學家麥金利當年在多國旅遊時聽到女變男的傳聞,經深入調查和研究,發現這是一種種罕見的遺傳病。在母體時,不論男胎還是女胎,雙腿間都會有一個小突,帶有Y染色體的男胎在8周左右會分泌大量雄性激素,讓小突長成陰莖,但若基因裡缺乏5α還原酶,就不能分泌二氫睪固酮,小突就會長成似陰道的器官。麥金利還發現一個有趣現象,這些青春期才變男的孩子長大成人後,多半有強烈的異性戀傾向。因此她認為,胎兒在母體時分泌的荷爾蒙相較於後天的養育,更能左右性傾向。(中國時報),