- Not of child bearing potential ie, either documented irreversible surgically sterile (bilateral oophorectomy or hysterectomy is acceptable, but not tubal ligation) or post-menopausal. Post-menopausal is defined as serum follicle-stimulating hormone (FSH) levels in the post-menopausal range combined with amenorrhea for more than 1 year in a woman above 50 years of age, or amenorrhea for more than 2 years below 50 years of age