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Power Doppler ultrasound (US), in combination with three-dimensional US and virtual organ computer-aided analysis (VOCAL), is a very good approach for investigating the global ovarian vascular network and its correlation with ovarian response in assisted reproductive technology (ART). An ovarian vascular map is easily obtained from a sagittal section of the ovary. Three-dimensional US has become a key tool for diagnosing uterine malformations. Leiomyomas and endometrial polyps are the most frequent benign uterine pathologies, and both can interfere with the reproductive process. The human endometrium undergoes intense angiogenesis during menstrual cycle, and angiogenesis is a key process for successful embryo implantation and development. In reproductive medicine, it is crucial to exclude ectopic pregnancy as early as possible. 3D US is a more accurate technique for evaluating the relationship between the gestational sac and uterine septum and for differentiating between a cornual pregnancy and a displaced intracavitary pregnancy.