ULTRA-LAP is a prospective study is to investigate the safety, efficacy and feasibility of laparoscopic debulking surgery (LDS) for the treatment of patients with advanced ovarian cancer. The outcomes to measure are: * Safety: the rate of patients experiencing intra- and post-operative early and late morbidities (within the hospitalization and up to 60 days from surgery) * Efficacy: the rate of patients in which the surgical target set pre-operatively (complete resection) is achieved by laparoscopy. * Feasibility: the rate of patients who have their procedure completed by laparoscopy Patients will undergo laparoscopic debulking surgery (LDS) if the surgical target can be met. If it cannot be achieved by laparoscopy the surgeon will convert to laparotomy.