主页 > 医药生命 >
研究称输精管切除重新接通后生殖力大不如前
3月31日在英国生殖协会（British Fertility Society）的会议上发表的一项研究结果显示，此类手术对精子数量有长期的影响。
即使这一过程获得了逆转，接受过输精管切除术的男性精子数量也会减少，同时其配偶接受了受孕治疗后，其成功率也会比较低。
“我们没有预料到因输精管切除术而导致精子数量的减少或怀孕成功率的降低，我们将继续研究，以了解其中原因，”王后大学（Queen's University）的麦克维卡（Carmel McVicar）教授说。
在王后大学进行的研究中，麦克维卡及其同伴发现，进行过该手术的男性精子数量比正常人少三分之一。
经过不育症治疗的男性生育成功率也要比常人低50%。
王后大学妇产科系的麦克科鲁尔（Neil McClure）教授表示，手术影响精子数量的过程尚不知晓，但其影响是持久的。
“想进行输精管切除术的男性必须仔细考虑清楚该手术对其将来生育能力的长期影响，”麦克维卡教授说。
Even if Reversed, Vasectomy Lowers Sperm Count
LONDON - Vasectomies may not be as reversible as doctors had previously thought. New research presented at a meeting of the British Fertility Society on Wednesday shows that the operation has a long-lasting effect on sperm count. Men who have had a vasectomy, even if it has been reversed, produce less sperm and have poorer success rates when their partners have fertility treatments. "We did not expect to see this reduction in sperm count or pregnancy due to previous vasectomy and ongoing studies are attempting to decipher the reasons for it," said Dr Carmel McVicar, of Queen's University in Belfast. Vasectomy involves cutting and blocking the tubes through which the sperm pass into the semen so a man will not be able to father children. Reversing it can be difficult and it is not always successful, especially if it has been done many years earlier. In studies conducted at the university, McVicar and her colleagues found that men who had had the operation produced about a third less sperm than men who had not had a vasectomy. Their success rate after a treatment for male infertility was also about 50 percent lower. "In the past, a vasectomy was for life. Now men attend our clinic every week wanting to have a second family with a new partner," McVicar told the meeting. Professor Neil McClure, of the obstetrics and gynecology department at the university, said how the surgery affects sperm count is unknown but the impact seems to be permanent. "Men who are considering vasectomy certainly need to think very carefully about the long-term consequences to their future fertility," McVicar added. In a separate study presented at the three-day meeting researchers from the university said smoking cannabis damages male fertility by impairing the sperm's ability to fertilize the female egg. The findings confirm early research by American scientists who suggested that THC, the active ingredient in cannabis, impedes sperm motility, or ability to swim. "Infertility already affects one in six couples across the United Kingdom and 40 percent of these cases are due to problems with sperm," said Dr Lyn Whann, who presented the research. 输精管切除术是不是指输精管结扎术？
输精管切除术后再通对生殖力影响与术后时间有没有关系？ [标签:content1][标签:content2]
阅读本文的人还阅读：
作者:admin@医学,生命科学 2011-02-17 05:11
医学,生命科学网