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男性腰围越大生育力越差

2017-10-21 4页 doc 18KB 14阅读

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男性腰围越大生育力越差男性腰围越大生育力越差 1 男性腰围越大生育力越差 过去的研究结果表明,肥胖影响女性的生育能力。现在新的研究发现,肥胖也会影响男性的生殖力。如果肥胖男子与肥胖女子结合,两人的肥胖就会叠加起来并形成放大效应。 腰围越大 精子越差 不久前,在西班牙巴塞罗那举行的欧洲人类生殖和胚胎学会议上公布的一项新的研究显示,肥胖男性与腰围正常的男性相比,劣质精子更多。这意味着男人腰围越大,生殖能力越差,甚至会不育。 英国阿伯丁大学吉亚思?沙叶布的研究小组分析了苏格兰5000多名男人的精子,同时根据身体质量指数(BMI),即体重(千克...
男性腰围越大生育力越差
男性腰围越大生育力越差 1 男性腰围越大生育力越差 过去的研究结果明,肥胖影响女性的生育能力。现在新的研究发现,肥胖也会影响男性的生殖力。如果肥胖男子与肥胖女子结合,两人的肥胖就会叠加起来并形成放大效应。 腰围越大 精子越差 不久前,在西班牙巴塞罗那举行的欧洲人类生殖和胚胎学会议上公布的一项新的研究显示,肥胖男性与腰围正常的男性相比,劣质精子更多。这意味着男人腰围越大,生殖能力越差,甚至会不育。 英国阿伯丁大学吉亚思?沙叶布的研究小组了苏格兰5000多名男人的精子,同时根据身体质量指数(BMI),即体重(千克)除以身高(米)的平方,将这些男性分成不同的组别。BMI在20~25之间为正常体重,25~29为超重,30及以上为肥胖。 结果表明,BMI在20-25的男人拥有较高水平的正常精子,而超重和肥胖者不仅精液量(精子数量)较少,而且正常精子数量也不多。肥胖男人拥 有较少精子的几率在60%以上,而其带有异常精子的几率也在40%以上。超重者与肥胖男人的情况差不多。沙叶布等人在研究中排除了其他可能影响精子计数的 因素,如吸烟、饮酒、滥用药物以及年龄等,证实肥胖的确影响精子计数和精子质量。 为什么肥胖会影响男人的精子数量和质量, 现在有一些理论和假说,其中比较得到认同的是三种。一是脂肪组织会影响到性激素代谢,由此可能妨碍精子的生成和精子质量。二是温度可能对精子生成造成负 面影响。人的正常体温是37?左右,而精子生成的最佳温度要比正常温度低2?。肥胖男子脂肪较多,因而他们的体温比正常人更高。阴囊部位的温度高,会直接 影响到睾丸的生精能力,造成精子生成减少;即使精子生成数量不受影响,但生成后的精子质量也会受到影响。 糖尿病患者精子损害多 另外,肥胖会引发糖尿病或隐性糖尿病,此病也会对精子造成损害,并因此影响男性的生育力。对此,其他研究人员的研究予以了证明。贝尔法斯特王后 大学的科恩?马里迪斯对40名虽然不超重但却患糖尿病的男性进行治疗时发现,由于患糖尿病,患者血液中糖水平较高,由此损害了他们精子中的DNA。他们发 现,患糖尿病者精子损害的几率是未患糖尿病正常男性的两倍。 尽管如此,研究人员还是不能确认肥胖就一定造成不育,这还得看其他因素。例如,肥胖男子与正常女子结婚,肥胖男子的生育功能会得到对方补偿,因而并不一定会造成不育。但是,如果肥胖男子与肥胖女子结合,两人的肥胖就会叠加起来并形成放大效应,造成不育。 The past research results show that obesity affect a woman's fertility. Now a new study found that obesity can affect male fertility. If the obese men and obese women, two people's obesity will stack up and form the amplification effect. 1 2 The larger the waist sperm the poor Not long ago, held in Barcelona, Spain's European society of human reproduction and embryology conference, according to www.xilishi1.com a new study released obese men with waist circumference compared to normal men, poor sperm more. This means that the man waist size is larger, the worse they reproductive ability, and even sterility. Robert Aberdeen university of Virginia ShaYeBu's team analyzed the Scotland more than 5000 men's sperm, according to body mass index (BMI) at the same time, the weight (kg) divided by the square of the height (m), these men into different categories. BMI for normal weight between 20 ~ 25, 25 to 29 for overweight, 30 or above for obesity. The results showed that the BMI in 20-25 men have higher levels of normal sperm, and overweight and obese semen volume not only () the number of sperm is less, and normal sperm counts much. Obese men have less risk of sperm in more than 60%, and the risk of abnormal sperm with above 40%. The situation of the overweight and obese men. ShaYeBu and others in the study by excluding other factors that may affect the sperm count, such as smoking, drinking, drug abuse, and age, that obesity is indeed affect the sperm count and sperm quality. Why obesity can affect a man's sperm count and quality? Now there are some theories and hypothesis, including comparative identification is three. One is adipose tissue can affect sex hormone www.zhytech.com metabolism, which can hinder the formation of sperm and sperm quality. Secondly, the temperature may be negative side effects on the sperm production. The normal temperature of people is 37 ? or so, and sperm production best temperature 2 ? lower than the normal temperature. More fat fat man, and so their body temperature is higher than normal. The temperature of the scrotum area is high, will directly affect the testicular sperm production capacity, reduce sperm production; Even if the number of sperm production is not affected, but the quality of generated after sperm would also be affected. Sperm damage many diabetes patients In addition, obesity can lead to diabetes or hidden diabetes, the disease will cause damage to sperm, and thus affect male fertility. To this, other researchers to be proved. Cohen, a professor at the university of Belfast queen, Mali, Edith to 40, although not overweight but found that men with diabetes treatment due to diabetes, patients in the blood sugar level is higher, so damage the DNA in their sperm. Their hair, sperm damage risk of diabetes is twice the normal men without diabetes. Still, the researchers still can't confirm that obesity can cause infertility, it also depends on other factors. Obese men with normal women get married, for instance, the obese man's fertility function will be compensated each other, and thus will not necessarily cause infertility. However, if the obese men and obese women, two people's obesity will stack up and form the amplification effect, cause infertility. 2
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