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Two new risk factors were uncovered: six patient\u2010mothers received hormones during the Index pregnancy compared to only one control\u2010mother, and eight patient\u2010mothers and two control\u2010mothers reported excessive nausea as a complication of the index pregnancy. A hypothesis linking these three factors is presented: viz. that a major risk factor for testis cancer is a relative excess of certain hormones (in particular estrogen) at the time of differentiation of the testes.<\/jats:p>","DOI":"10.1002\/ijc.2910230503","type":"journal-article","created":{"date-parts":[[2007,2,19]],"date-time":"2007-02-19T17:46:10Z","timestamp":1171907170000},"page":"598-602","source":"Crossref","is-referenced-by-count":273,"title":["Risk factors for cancer of the testis in young men"],"prefix":"10.1002","volume":"23","author":[{"given":"Brian E.","family":"Henderson","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Barbara","family":"Benton","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jennie","family":"Jing","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mimi C.","family":"Yu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M. 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