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產科新知 : 孕婦可不可以喝咖啡?美國新研究...
發表者 wangob 於 2008-01-22 10:46:54 (5977 人氣)

懷孕婦女喝含咖啡因飲料會不會升高流產機率?安全攝取量是多少?這兩個問題在婦產科界一直沒有定論。美國最新一項調查研究顯示,咖啡、茶、可樂、熱巧克力之類飲料的咖啡因,確實會增加懷孕前期婦女的流產風險,大量攝取尤其危險。

 這項調查由美國最大醫療機構「凱薩醫療機構」(Kaiser Permanente)研究部華裔科學家李德坤(音)領導,論文發表在最新一期《美國婦產科醫學雜誌》(AJOG)。

 研究團隊調查一○六三名加州舊金山婦女,詳細記錄她們在懷孕的前廿周是否攝取咖啡因、攝取量、攝取時間與頻率、飲料類型、是否因懷孕而改變攝取習慣。

 這群孕婦後來有一七二人不幸流產。李德坤博士統計發現,以每日攝取量二百毫克(相當於兩杯一百五十cc的咖啡)為分界,比較完全不攝取、少量攝取、大量攝取咖啡因的孕婦,其流產比例分別是十二%、十五%、廿五%。換言之,一天兩杯咖啡,流產風險加倍。

 換算成其他飲料(一杯一百五十cc),二百毫克咖啡因相當於五杯茶、十三又三分之一杯可樂、一百杯熱巧克力。歐美公衛當局多半建議孕婦每日咖啡因攝取量不要超過三百毫克,但是從新研究看來,這項標準恐怕要向下修正。

 有醫師建議,孕婦在懷孕頭三個月最好別碰咖啡因,可以改喝低咖啡因飲料。

 過去有學者認為,健康的孕婦會因為害喜而戒掉咖啡因飲料,而她們流產的機率本來就比較低,因此很難斷定咖啡因與流產的關聯。不過李德坤的研究已排除這項因素的干擾。

 科學家目前還無法解釋咖啡因與流產的關聯性。李德坤指出,咖啡因會經由胎盤進入胎兒體內,讓胎兒的新陳代謝體系難以消受。同時咖啡因也會影響細胞生長,降低胎盤血液流量,可能因此對胎兒造成傷害。

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發表日: 2013-04-03 17:27  更新: 2013-04-03 17:27
 Re: 孕婦可不可以喝咖啡?美國新研究...
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發表日: 2012-08-29 11:17  更新: 2012-08-29 11:17
 Re: 孕婦可不可以喝咖啡?美國新研究...
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發表日: 2012-07-04 11:41  更新: 2012-07-04 11:41
 Re: 孕婦可不可以喝咖啡?美國新研究...
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發表日: 2012-05-29 14:16  更新: 2012-05-29 14:16
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發表日: 2012-05-21 14:22  更新: 2012-05-21 14:22
 Re: 孕婦可不可以喝咖啡?美國新研究...
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發表日: 2012-05-19 23:00  更新: 2012-05-19 23:00
 Re: 孕婦可不可以喝咖啡?美國新研究...
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發表日: 2012-03-28 23:47  更新: 2012-03-28 23:47
 Re: 孕婦可不可以喝咖啡?美國新研究...
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發表日: 2010-12-05 09:03  更新: 2010-12-05 09:03
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 Re: 孕婦可不可以喝咖啡?美國新研究...
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