Aim: To determine the Ovarian risk factors of female infertility by transvaginal ultrasonography Study design: Cross sectional validation study Methods: The study comprised women visiting the department with unexplained infertility for treatment during the period of 2018 to 2020. A total of 550 cycles were inducted primarily referred for ovarian assessment by ultrasound with patent tubes and normal utero-ovarian morphology. All those women having no conception with normal semen analysis of their husbands. Male factor infertility was also excluded. Baseline transvaginal sonography (TVS) was performed at proliferative phase, of the cycle. Mature follicles were studied by TVS. On an individual basis, the following parameters, that is, follicle size, ovarian volume and ovarian artery Doppler PI, RI were studied. Follicle size and ovarian artery Doppler flow were highly significant for a pregnancy. Results: In this research two types of infertility was compared with normal group as for as the primary infertile females were 99 (18.00%) and secondary infertile females were 144 (26.18%) and normal were 307 (55.82%). Out of 550 patients 243 (44.18%) patients were infertile and 307 (55.82%) were normal. Discussed in this research. Conclusions: Ovarian ultrasound assessment proved to be a simple, noninvasive and authentic to predict the ovarian environment and thereby helping in the prediction of the outcome in infertility. Keywords: Infertility, Doppler ultrasonography, Transvaginal ultrasonography, Resistive index, Pulsatility index