Abstract:Objective To analyze the effect of transvaginal four-dimensional hysterosalpingo-contrast sonography (TVS4D-HyCoSy) combined with anti-human chorionic gonadotropin (HCG) antibody on the evaluation of tubal patency in infertility.Methods A total of 98 infertile patients who were admitted to Fuyang People's Hospital from January 2019 to March 2021 were selected. All patients underwent TVS4D-HyCoSy examination followed by laparoscopic hydrotubation after 3 months, and enzyme-linked immunosorbent assay was applied to determine serum anti-HCG antibody levels. The positive rate of serum anti-HCG antibodies was determined in patients with different evaluation scores of fallopian tubes, and the results of laparoscopic hydrotubation were established as the gold standard to evaluate the diagnostic efficacy of TVS4D-HyCoSy, anti-HCG antibodies and the combined detection of the two for tubal patency in infertility.Results The positive rate of serum anti-HCG antibody was significantly different among infertile patients with distinct evaluation scores of fallopian tubes (P < 0.05), and was higher in degree Ⅲ patients than in degree Ⅱ patients but lowest in degree I patients. A total of 193 fallopian tubes were examined in 98 infertile patients, among which 40 were unobstructed, 73 were obstructed and 80 were blocked. The sensitivity (92.50%), specificity (88.24%) and accuracy (89.12%) for evaluating tubal patency in infertility of TVS4D-HyCoSy combined with anti-HCG antibody were higher than those of TVS4D-HyCoSy (75.00%, 81.05%, and 79.79%, respectively) or anti-HCG antibody (62.50%, 76.47%, and 73.58%, respectively) alone (P < 0.05).Conclusions TVS4D-HyCoSy combined with anti-HCG antibody exhibits high sensitivity, specificity and accuracy in the assessment of tubal patency in infertility, and may therefore guide clinical diagnosis and treatment.