10. For Part A, B, C subjects: Women of childbearing potential must have a negative serum pregnancy test and women and men subjects must agree to use effective means of contraception with their partner as indicated by protocol For Part D subjects: a negative serum pregnancy test is required within 10- 14 days prior to initiating with pomalidomide, AND a negative serum pregnancy test within 24 hours of starting pomalidomide and must either commit to continued abstinence from heterosexual intercourse or begin two acceptable methods of birth control at least 28 days before she starts taking pomalidomide.