- Participants of child-bearing potential must agree to use two highly effective and acceptable forms of contraception from screening, throughout their participation in the study and for 180 days after the last dose of durvalumab + tremelimumab combination therapy or 90 days after last dose of durvalumab or olaparib, whichever is the longer time period (e.g., hormonal or barrier method of birth control); should a woman become pregnant or suspect she is pregnant while she or her partner is participating in this study, she should inform her treating physician immediately