Condom performance during vaginal intercourse: comparison of Trojan-Enz and Tactylon condoms.

Forty-nine mutually monogamous couples used a total of 478 condoms during vaginal intercourse in a prospective trial whose purpose was to discover whether the performance of a new non-latex hypoallergenic condom was substantially equivalent to that of a leading condom brand already being marketed. Of these 478 condoms, seven (1.46%) either broke or fell off the penis during intercourse. Two (0.42%) of the 471 condoms that did not break or fall off during intercourse fell off the penis when it was being withdrawn from the vagina. Altogether, 469 (98.1%) of the 478 condoms used for intercourse survived intact throughout intercourse and withdrawal. Differences in breakage and slippage rates for the two condom brands were statistically insignificant. The overall 98.1% success rate is much higher than the rate of success found in a previous condom trial with nearly identical research protocol. The reason for the difference is attributed to much more precise questioning of subjects in the current trial.