- Male participants able to father children and female participants of childbearing potential and at risk for pregnancy must agree to use a highly effective method of contraception throughout the study and for at least 5 days after the last dose of assigned treatment. Female subjects who are not of childbearing potential must these meet requirements: Achieved postmenopausal status, defined as follows: cessation of regular menses for at least 12 consecutive months with no alternative pathological or physiological cause; and have a serum follicle-stimulating hormone (FSH) level confirming the post-menopausal state; have undergone a documented hysterectomy and/or bilateral oophorectomy; have medically confirmed ovarian failure. All other female subjects (including females with tubal ligations) will be considered to be of childbearing potential.