Abstract: Objective To analyze the value of three-dimensional vaginal ultrasound in evaluation of ovarian reserve function of patients with luteinized unruptured follicle syndrome.
Methods One hundred infertile patients in our hospital were selected as the research objects. According to the relevant evaluation criteria, the patients who were diagnosed as luteinized unruptured follicle syndrome were taken as the research group（n=20）, and the other normal ovulated infertile patients were taken as the control group（n=80）. The endometrial thickness, six levels of serum sex stimulating hormone, ovarian blood flow parameters at the dominant side of each follicle and blood flow classification of mature follicles in the periovulation period were compared in the two groups.
Results The difference of vascularization index（VI）, blood flow index（FI） and vascularized blood flow index（VFI） between inter group, time point and inter group·time point interaction were statistically significant(P＜0.01). The blood flow of mature follicles in the control group was 3-4 grades, and that in the study group was 1-2 grades. There was significant difference between two groups(P＜0.01).
Conclusion Low blood flow and less neovascularization of mature follicles are the characteristics of blood flow perfusion in luteinized unruptured follicle syndrome. Transvaginal three-dimensional ultrasound is more conducive to early evaluation of ovarian reserve function, guiding clinical recognition and prediction of follicular dysplasia and early ovulation disorders.

Key words: Ovarian Follicle, three-dimensional vaginal ultrasound, ovarian reserve function