<tt id="6hsgl"><pre id="6hsgl"><pre id="6hsgl"></pre></pre></tt>
          <nav id="6hsgl"><th id="6hsgl"></th></nav>
          国产免费网站看v片元遮挡,一亚洲一区二区中文字幕,波多野结衣一区二区免费视频,天天色综网,久久综合给合久久狠狠狠,男人的天堂av一二三区,午夜福利看片在线观看,亚洲中文字幕在线无码一区二区

          Society

          Men could take fertility into their own hands

          By Cui Jia (China Daily)
          Updated: 2011-06-18 07:40
          Large Medium Small

          BEIJING - "Are you on the pill?"

          It's a question men often ask before taking intimacy to the next level, but in the future it might be women doing the asking.

          Researchers at Columbia University Medical Center in New York City have tested a drug on mice that can quickly and reversibly stop sperm production.

          Unlike birth control pills for females, the BMS-189453 pill is not hormone-based. By studying mice, researchers found low doses of the drug stopped sperm production and did not have significant side effects. Fertility was restored shortly after the mice stopped treatment.

          Related readings:
          Men could take fertility into their own hands Hormone could restore fertility in lean women
          Men could take fertility into their own hands New egg bank will address women's fertility problems
          Men could take fertility into their own hands Fertility drugs may pose some uterine cancer risk

          Developed more than 10 years ago as a possible treatment for skin and inflammatory diseases, the drug's sperm-stunting potential was originally considered a toxic side effect.

          Actually, China once developed and tested a male-hormone-based birth control pill on a small group of male volunteers but it failed to enter the market due to its side effects, said Cheng Linan, chairperson of the Chinese Society of Family Planning at the Chinese Medical Association.

          "As a side effect of the daily pill, men it was tested on experienced weight gain, although the pill did help to turn off the production of sperm," said Cheng.

          Female contraceptives use hormones, estrogens and progestins, to shut off the release of eggs to prevent pregnancy. Male hormonal contraceptives work pretty much the same way: hormones such as testosterone and progestins are used to turn off sperm production.

          Such birth control pills were welcomed by some Chinese men, Cheng added. "Some even asked to stay on it even after the experiment stopped."

          Cheng said she believes a male birth control pill has great potential in China because they could have another choice in contraception. "Some men just don't like to use condoms or consider surgery. With the pill they could have another way to take their own initiative."

          But are men willing to take a contraceptive pill, every single day, if it's offered to them?

          "How could the pill control millions of sperms? What if a handful of them survived?" said Wang Xin whose wife is now on the pill. The 30-year-old IT consultant in Beijing added that he has no patience to take the pill every day.

          On the other hand, Gu Xinguo, 35, welcomes the pill. "I will take it as long as the pill is not hormone-based. I heard hormone therapy for women has many side effects so I really don't want my wife to take it," said the restaurant owner who admitted that he doesn't like wearing condoms at all.

          "I'm not going to trust any man who claims he is on the pill. I have to protect myself because I don't want any accident to happen," said Hu Jie, a 22-year-old university student in Beijing.

          主站蜘蛛池模板: 久久精品国产高潮国产夫妻 | 动漫av网站免费观看| 亚洲精品一区二区动漫| 国产在线午夜不卡精品影院| 狠狠综合久久久久综| 国产香蕉九九久久精品免费| 久久AV中文综合一区二区| 狠狠狠狠888| h动态图男女啪啪27报gif| 天堂av成人网在线观看| 欧洲精品色在线观看| 久久被窝亚洲精品爽爽爽| 中文字幕在线精品人妻| 50路熟女| 公与媳妻hd中文在线观看| 人人爽亚洲aⅴ人人爽av人人片| 成人福利国产午夜AV免费不卡在线| 中文字幕久区久久中文字幕| 国产精品嫩草影院一二三区入口| 国产亚洲精品va在线| 中文国产不卡一区二区| 色悠悠在线观看入口一区| 亚洲天堂在线观看完整版| 日本一本正道综合久久dvd| 老子影院午夜久久亚洲| 国产麻豆放荡av激情演绎| 综合色一色综合久久网| 日本一区二区三区黄色网| 国产午夜福利片在线观看| 97久久综合亚洲色hezyo| 亚洲av无码精品色午夜蛋壳| 无码人妻丰满熟妇区毛片18| 久久精品国产亚洲av麻豆小说| 深夜国产成人福利在线观看女同| 亚洲精品美女一区二区| 国产精品日本一区二区不卡视频| 天天综合色一区二区三区| 久久99热只有频精品8| 樱花草视频www日本韩国| 亚洲www啪成人一区二区麻豆 | 久久香蕉国产线看观看亚洲片|