Most of the side effects of fertility medications are minor and will vary depending on the individual. Some donors have reported bloating, nausea, hot flashes or headaches. We recommend that you talk to the doctor before beginning treatment if you have any questions, since he/she is best qualified to answer medical questions. The official website of the American Society for Reproductive Medicine (www.asrm.org) is also an excellent source of information on infertility treatments and medications.