http://articles.mercola.com/sites/articles/archive/2008/01/02/fertility.aspxSeveral popular over-the-counter herbs, including St. John's Wort and echinacea, could badly affect people's fertility. High doses of echinacea, ginkgo and St. John's wort can damage reproductive cells, can stop sperm from fertilizing eggs and might damageenCommunityServer 2008.5 SP1 (Build: 31106.3070)