女性過量飲用咖啡危害大 或導致不孕

Scientists say they have discovered why drinking coffee makes it harder for women to conceive.

科學家宣稱，他們已經發現了飲用咖啡所導致女性懷孕機率下降的原因所在。

Caffeine, the stimulant in coffee, impairs the transport of eggs from the ovaries to the womb, they found.

研究發現，咖啡中所富含的咖啡因會印象到卵子從卵巢進入子宮的這一過程。

Previous studies had shown that consuming too much coffee affected female fertility.

之前不少的研究已經正式，過量的飲用咖啡或導致女性的生育能力下降。

Recent reSearch involving 9,000 women found that drinking more than four cups a day cut the chances of conceiving by a quarter.

在最近的一項研究中，調查了9000名女性的相關情況，發現每天飲用超過四倍以上的咖啡會使得女性成功受孕的機率下降四分之一。

Until now, the reason for the link was a mystery.

直到如今，這兩者時間的關聯依舊難以解釋。

The new investigation, conducted on mice, showed that caffeine inhibits contractions of the fallopian tubes which are needed to carry eggs to the womb.

在最新的研究中，研究者們對於小白鼠進行了相關的實驗，結果顯示咖啡因會使得輸卵管內壁引導細胞的能力降低。

The stimulant de-activates specialised pacemaker cells in the walls of the tubes. These cells co-ordinate waves of tube contractions which move the eggs towards the womb.

引導能力的降低將抑制輸卵管的收縮，從而影響了卵子進入子宮的過程。

Study leader Sean Ward, from the University of Nevada in Reno, U.S., said: ‘This finding provides an intriguing explanation as to why women with high caffeine consumption often take longer to conceive than women who do not consume caffeine.’

研究負責人，美國內華達州立大學的肖恩·沃德博士稱，“該研究揭示了爲什麼長期飲用咖啡的女性要比那些不喝咖啡的女性懷孕更加困難的真正緣由。”