[evandijk70]

I looked up the study, and it seems that participants were not allowed to use a second method of birth control:

"Couples enrolled in the efficacy phase were asked to rely only on these injections for contraception."

And there were four pregnancies during the study (from the abstract of the study):

During the efficacy phase of up to 56 weeks, 4 pregnancies occurred among the partners of the 266 male participants, with the rate of 1.57 per 100 continuing users (95% CI, 0.59 – 4.14)

[morsch]

Thanks for the correction.