Investigation of the uterine cavity in recurrent aborters.

To prospectively compare the diagnostic ability of both HSG and diagnostic hysteroscopy in recurrent aborters, an HSG followed by a diagnostic hysteroscopy was performed in 106 patients during an investigation into recurrent abortions. The uterine cavity findings on HSG and at hysteroscopy were compared. Among the 60 abnormal HSG patients, intrauterine pathology was demonstrated in 37 (34.9%). Among the 46 normal HSG patients, a normal uterine cavity was found in 33 (31.3%). The sensitivity of the HSG in revealing intrauterine abnormalities was therefore 79% and its specificity 60%. In 23 pathologic HSG, no abnormalities were seen by hysteroscopy. In 13 cases, hysteroscopy demonstrated mild intrauterine findings overlooked by HSG. The false-positive rate was 38% and the false-negative rate was 28%. Hysterosalpingography showed a high false-positive rate, especially in the intrauterine adhesions group. In view of the low specificity and high false-positive and false-negative rates, we believe that hysteroscopic evaluation of the uterine cavity is superior to HSG in recurrent abortions.