12. Female patients of childbearing potential (defined as < 2 years after last menstruation and not surgically sterile) and male patients who are not surgically sterile or with female partners of childbearing potential must agree to use effective, non-hormonal means of contraception (intrauterine contraceptive device, barrier method of contraception in conjunction with spermicidal gel) prior to study entry, for the duration of study participation and for 66 days (10 half-lives of Lu-177) after the last dose of Lu-177- DOTATATE