Primary dysmenorrhea and uterine blood flow: a color Doppler study.

Objective: To examine pulsatility index (PI) and resistance index (RI) values in the uterine and arcuate arteries of patients with primary dysmenorrhea (PD) by color Doppler ultrasonography.

Study Design: A total of 49 female university students were recruited for this prospective, observational study. The study group consisted of 25 nulliparous women with PD and a control group of 24 healthy, nulliparous women without dysmenorrhea.