维生素d能提高精子移动速度-凯发k8官网

维生素d能提高精子移动速度
文章来源:未知 文章作者:enread 发布时间:2011-05-26 08:35 字体: [ ] 
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vitamin d is important for 1(最佳的) reproductive function in both animals and humans. it has long been known that 2(血清,浆液) vitamin d level is important for reproductive function in various animals, but now researchers from the university of copenhagen and copenhagen university hospital have shown that this relationship can also be demonstrated in humans. a new study conducted in 300 normal men showed a positive 3 between the percentage of motile 4 and serum vitamin d levels. the study was recently published in the scientific journal human reproduction, and showed additionally that 5 of human spermatooza in the laboratory with 6 vitamin d can increase their forward movement.

"our study is not sufficient and should not be used to change existing treatment practices. however, it uncovers some of the functions of vitamin d and generates new hypotheses. this is an 7(有趣的) finding, because it suggests that vitamin d has an effect on sperm movement and function," explains martin blomberg jensen from copenhagen university hospital.

"however, this finding is not sufficient in determining whether vitamin d supplements may improve sperm quality in normal or 8 males. this study is one in a line of studies indicating that vitamin d is necessary for male reproduction," says martin blomberg jensen.

today, there is no known medical treatment proved to improve semen quality in well-designed randomised trials, although several papers have shown numerous positive associations between various drugs such as antioxidants, 9, various vitamins etc. and semen quality.

"low semen quality may have numerous causes, but it often has a fetal origin similar to some male genital(生殖器) malformations and testicular(睾丸) cancer. however, this study indicates that factors in adult life may also play a role for semen quality," says professor anders juul from the university of copenhagen and copenhagen university hospital's department of growth and reproduction.

"it is important to find all factors of importance, because semen qaulity in danish men is at a low level and contributing to a very high incidence of fertility problems among danish couples," says anders juul.

the authors conclude that there is a need to 10 reproductive research to identify relevant factors and conduct placebo-controlled trials to clarify whether vitamin d supplements are beneficial for infertile men.



点击收听单词发音收听单词发音  

1 zmdzhm     
adj.最适宜的;最理想的;最令人满意的
参考例句:
  • what is the optimal mix of private and public property rights in natural resources?私人和国家的自然资源产权的最适宜的组合是什么?
  • optimal path planning is a key link for the sailing contest.帆船最优行驶路径规划是帆船比赛取胜的关键环节。
2 8seys     
n.浆液,血清,乳浆
参考例句:
  • the serum is available to the general public.一般公众均可获得血清。
  • untreated serum contains a set of 11 proteins called complement.未经处理的血清含有一组蛋白质,共11种,称为补体。
3 rogzg     
n.相互关系,相关,关连
参考例句:
  • the second group of measurements had a high correlation with the first.第二组测量数据与第一组高度相关。
  • a high correlation exists in america between education and economic position.教育和经济地位在美国有极密切的关系。
4 jfozo     
n.精子,精液
参考例句:
  • only one sperm fertilises an egg.只有一个精子使卵子受精。
  • in human reproduction,one female egg is usually fertilized by one sperm.在人体生殖过程中,一个精子使一个卵子受精。
5 buiwl     
n.刺激,激励,鼓舞
参考例句:
  • the playgroup provides plenty of stimulation for the children.幼儿游戏组给孩子很多启发。
  • you don't get any intellectual stimulation in this job.你不能从这份工作中获得任何智力启发。
6 c3905c37f4127686d512a7665206852e     
adj. 激活的 动词activate的过去式和过去分词
参考例句:
  • the canister is filled with activated charcoal.蒸气回收罐中充满了活性炭。
7 vqyzm1     
adj.有趣的;迷人的v.搞阴谋诡计(intrigue的现在分词);激起…的好奇心
参考例句:
  • these discoveries raise intriguing questions. 这些发现带来了非常有趣的问题。
  • it all sounds very intriguing. 这些听起来都很有趣。 来自《简明英汉词典》
8 u71xe     
adj.不孕的;不肥沃的,贫瘠的
参考例句:
  • plants can't grow well in the infertile land.在贫瘠的土地上庄稼长不好。
  • nobody is willing to till this infertile land.这块薄田没有人愿意耕种。
9 dfxwx     
n.锌;vt.在...上镀锌
参考例句:
  • brass is formed by the fusion of copper and zinc.黄铜是通过铜和锌的熔合而成的。
  • zinc is used to protect other metals from corrosion.锌被用来保护其他金属不受腐蚀。
10 s5pxe     
vt.加强;变强;加剧
参考例句:
  • we must intensify our educational work among our own troops.我们必须加强自己部队的教育工作。
  • they were ordered to intensify their patrols to protect our air space.他们奉命加强巡逻,保卫我国的领空。
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