Irrigation during vasectomy: a comparison between sterile water and the spermicide euflavine.

In a randomized, double-blind investigation 36 men undergoing sterilization had irrigation of the vas deferens with either sterile water or the spermicide, euflavine, to reduce the lag to sterility. Semen samples were vital stained by the patients shortly after ejaculation and the smears were mailed to the laboratory. Irrigation with the spermicide was significantly more effective than sterile water. However, even in the group irrigated with euflavine 6 to 35 days elapsed before the semen samples were without potentially fertile spermatozoa.