- A FCBP (female of childbearing potential) is a sexually mature woman who: 1) has not undergone a hysterectomy or bilateral oophorectomy; or 2) has not been naturally postmenopausal for at least 24 consecutive months (i.e., has had menses at any time in the preceding 24 consecutive months) 13. Able to take aspirin (acetylsalicylic acid, ASA) at 81 or 325 mg/daily as antiplatelet therapy if platelet count is above 30 x 109/L (subjects intolerant to ASA may use warfarin or low molecular weight heparin)