The Effect of Assisted Reproductive Technologies on Gynecological Cancer: Report of Our Experiences and Literature Review

INTRODUCTION Infertility is as an important and common problem in couples necessitating assisted reproductive technology (ART) or drug therapy. Infertility is known as a risk factor for ovarian, breast and endometrial cancer. We aimed on evaluation of the history of primary infertility and previous ART in patients with the above-mentioned cancers. MATERIAL AND METHOD In this retrospective study we evaluated all of the risk factors in patients with breast cancer, ovarian cancer and endometrial cancers who referred to the Gynecological Oncology Clinic in Shahid Sadoughi Hospital in Yazd, Iran from 2002 to 2012. We also investigated the history of primary infertility and ART in these patients before diagnosis of cancers. RESULTS We gathered data from 92 patients with endometrial cancer, 84 patients with advanced epithelial ovarian cancer and 113 patients with breast cancer. There was history of infertility in 39.1% of patients with endometrial cancer who were obese (body mass index, BMI>29) and in 18.8% of patients with endometrial cancer and normal body mass index (BMI=25-29). ART had been performed in 7.3% of all patients with endometrial cancer. In patients with epithelial ovarian cancer, infertility was diagnosed in 28.4% and ART applied in 14.1%. Clomiphene with or without HCG and HMG was the most common drug used for patients with ovarian cancer. In patients with breast cancer, there was infertility in 16.5% and ART performed in 7.3%. CONCLUSION Although infertility was present as an important and fairly common risk factor in some patients with endometrial, ovarian and breast cancer, but some other factors may be more important, including age, BMI and the etiology of infertility. Finding the association between ART and gynecological cancers needs long cohort studies with follow-up of infertile women who get the ART or drug therapy for over 15-20 years. We think BMI and age (in addition to infertility and ART) are contributing factors for development of gynecological cancers.