Use of fertility drugs and risk of ovarian cancer

BACKGROUND: The potential association between fertility drugs and risk of ovarian cancer has been analysed using data from a case-control study conducted between January 1992 and September 1999 in four Italian areas. METHODS: Cases were 1031 women (median age 56, range 18-79 years) with incident, histologically confirmed epithelial ovarian cancer. Controls were 2411 women (median age 57, range 17-79 years) residing in the same geographical areas and admitted to the same network of hospitals for cases for a wide spectrum of acute, non neoplastic, non hormone-related conditions. RESULTS: A total of 15 cases and 26 controls reported use of fertility drugs. The corresponding odds ratio (OR) was 1.3 (95% confidence interval 0.7-2.5). The OR was 1.2 for women reporting last use < 25 years before interview and 1.3 for > 25 years. CONCLUSIONS: Considering calendar year at use, the OR was non-significantly above unity for women reporting fertility drug use after 1970, The OR was 0.6 among nulliparous women and 1.9 among parous ones.