- Women of childbearing potential should be advised to avoid becoming pregnant and men should be advised to not father a child while receiving treatment with Decitabine. The effects of Decitabine on the developing human fetus at the recommended therapeutic dose are unknown. For this reason, women of child-bearing potential and men must agree to use adequate contraception (hormonal or barrier method of birth control; abstinence) prior to study entry and for the duration of study participation. Should a woman become pregnant or suspect she is pregnant while participating in this study, she should inform her treating physician immediately.