Spectrum from a normal intraovarian artery in an 11-year-old girl shows low-resistance flow and a low PSV.
In arteries in the ovary without the dominant follicle, there is a pattern of relatively high resistance, whereas in the active ovary, both during ovulation and during the formation of the corpus luteum, there is a pattern of low resistance with a continuous antegrade arterial flow throughout diastole .


http://radiographics.rsna.org/content/28/3/691.full