- Pregnant women are excluded from this study because BCNU and/or Temozolomide are pregnancy risk D pharmaceutical agents with the potential for teratogenic or abortifacient effects. Because there is an unknown but potential risk for adverse events in nursing infants secondary to treatment of the mother with BCNU and/or Temozolomide, breastfeeding should be discontinued if the mother is treated with either of these agents. These potential risks may also apply to other agents used in this study.