This open-label, multicenter, phase 1b study will evaluate the safety and pharmacokinetics of DNIB0600A in patients with platinum-sensitive ovarian cancer. The maximum tolerated dose of intravenously infused DNIB0600A in combination with carboplatin will be determined in escalating dose cohorts. The combination of DNIB0600A and carboplatin will then be evaluated with and without bevacizumab [Avastin] in two dose expansion cohorts.