Sperm counts of men in North America, Europe, Australia and New Zealand are plunging, according to a new analysis published Tuesday.
원문출처 : http://www.cnn.com/2017/07/25/health/sperm-counts-declining-study/index.html
원문출처 : http://www.cnn.com/2017/07/25/health/sperm-counts-declining-study/index.html