Fundamental and clinical studies on T-1982 (cefbuperazone), a new cephamycin antibiotic, in the field of obstetrics and gynecology were carried out, and the following results were obtained. The levels of T-1982 transferred to uterine artery, elbow vein and uterus were determined after intravenous drip infusion of 1.0 g for 1 or 2 hours. No difference of concentration between uterine artery and elbow vein was observed from 45 minutes to 5 hours after the end of administration. The concentration of T-1982 in uterine artery ranged from 9.8 to 48 micrograms/ml after drug administration, and decreased slowly, but remained at about 10 micrograms/ml even 5 hours after the end of administration. Endometrium exhibited comparatively higher concentration of T-1982, but the difference of concentration was not observed among the other uterine tissues. T-1982 concentration ratios of various uterine tissues to elbow vein blood ranged from 172 to 10.2%, and mean ratio was 34.7%. Also, T-1982 concentration of more than 3 micrograms/g in each tissue was maintained for 2 hours after the end of administration. Clinical results on abscess of Bartholin's gland (1) and adnexitis (1) were good, although bacteria were not detected. No side effects caused by the drug were observed. These results indicate the usefulness of T-1982 in the treatment of infections in obstetrics and gynecology.