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外媒称中国年轻男子精子质量下降 或与污染有关

2016-12-02 08:22:14   

用于存储精子的液氮存储罐

参考消息网12月2日报道境外媒体称,中国空气污染问题严重,或引发“精子危机”。

据香港《东方日报》网站12月1日报道,美国有医学期刊发表关于湖南男性捐精者精液质量的研究报告显示,中国内地年轻男性精液质量大幅下滑,而去年在湖南捐精的年轻人中,竟然不到两成人的精液“足够健康”。研究指出,合格捐精者不足并非仅在湖南,但为何中国内地男性精液质量“下滑得如此迅速”暂仍难以解释,而环境污染加剧有可能是原因之一。

该份在美国医学期刊《生育与不孕》网站发表的研究报告,是持续了15年、对3万多名申请捐精者所进行的研究。报告发现,2015年在湖南年轻捐精者中,只有不到1/5人精液足够健康,有资格捐赠。但在2001年,是有超过半数捐精者合格。

报告又显示,中国内地为提升出生率付出的努力,目前正面临年轻男性捐精者的精液质量大幅下降的严重障碍,而湖南并非唯一合格捐精者不足的省份。对于捐精者生殖健康为何下滑如此迅速,研究人员指目前还没明确解释,但认为环境污染加剧,例如水污染、空气污染和食品污染等,是可能的原因之一。

根据世界卫生组织对近10年的评估数据,中国男性与三四十年前相比,每毫升精液所含精子数量从1亿个左右,大幅降至目前的2000万至4000万个。另有数据显示,20年前中国育龄人口中不孕不育的平均发病率仅3%,但2014年数据显示,内地不孕不育的平均发病率为12.5%~15%。

“越来越多的证据似乎都表明,男性不育正日益成为全国范围内的一个严重问题。”美国对外关系委员会全球健康高级研究员黄严忠指,如果这些发现反映出一种更广泛的趋势,将使中国日益加剧的人口问题进一步复杂化。

法国国际广播电台网站11月30日报道称,对于捐精者生殖健康为何下滑如此迅速,研究报告的研究人员表示,目前还没明确解释,但提到包括水污染、空气污染和食品污染在内的环境污染加剧是可能的原因之一。上海有专家更表明,环境污染加剧了各种不育症的诱因,造成生育难的现象。

报道引述上海市第一妇婴保健院生殖医学中心主任主任滕晓明分析,中国正处于高速工业化和城市化进程,相当一部分环境内分泌干扰物,通过如污染水源、食物或经皮肤吸收等途径进入身体后,对人类的生殖障碍、发育异常、某些癌症、免疫、神经系统疾病产生影响。

另据香港《东方日报》网站12月1日报道称,内地医生还称,除了污染问题外,现代女性普遍推迟结婚、生育,以及现今男女抽烟、饮酒、晚睡等不良生活习惯、过分减肥等,都会影响生育机能。

报道称,女性同样面对不育的困扰。上海有医生表示,男女都应要避免体重不足或超重,以免内分泌紊乱;且戒烟、戒酒也至关重要,因尼古丁会减少性激素的分泌量,过量饮酒也可危及生殖系统功能,导致内分泌紊乱,“对于打算怀孕的年轻夫妇们来说,戒掉抽烟、应酬、熬夜等不规律的生活迫在眉睫。”

医生称,现时女性普遍推迟结婚、生育年龄,年龄越大生育整体机能越下降,或会导致不育,“35岁以后女性生育能力更是明显走下坡路了,30岁之前则是最佳生育年龄。”


责任编辑:孙启浩 CN037
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