full access: Tumor Angiogenesis: Insights and Innovations (not specific to ovarian cancer)

"These two ongoing theories showcase the current problems in the field of antiangiogenic research in cancer. After several years of clinical trials, it appears that targeting one angiogenic factor is not enough to permanently halt neovascularization in most tumors. Although these results were initially disheartening, they also opened up the possibility of other angiostatic therapies.
Many clinical trials now use existing chemotherapeutic drugs or radiation along with antiangiogenic drugs. This two-front attack has had more
success than antiangiogenic drugs or chemotherapy alone in a majority of patients."