Excerpts from some excellent research papers can be selected below:

      A 1994 French study of contraceptive underwear (in English).

      Sperm production can be stopped for months using hot baths.

  Full Papers:

      A long report of using hot baths for contrception in India.

      A short report of using hot baths for contrception in India.

      A 1997 French study of the effect of body heat on spermatogenesis (in English).

  Links:

      A review of research on contraceptive suspensories.

      Three new methods for male contraception.