- The effects of sorafenib on the developing human fetus at the recommended therapeutic dose are unknown. Although radical RT-CT for cervix cancer is not compatible with survival of a developing fetus, women of child-bearing potential 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.