Role of the Fertilization Antigen (FA-1) in Immunoregulation of Fertility and Involuntary Infertility in Humans. In: Talwar GP, editor. Contraception Research for Today and the Nineties. New York: Springer; 1988. pp. 323-39. [DOI: 10.1007/978-1-4612-3746-4_30]

Passive immunization against prostatic 'inhibin' peptide as a male contraceptive

Passive immunization of adult male hamsters for 12 weeks against peptide (As-PIP), a sperm coating antigen, resulted in selective elevation of the blood levels of FSH, impairment of spermatogenesis, and complete infertility when males were mated with normal cycling females. Passive immunization of male marmosets with As-PIP for 8 weeks was also effective and was reversible, without causing any obvious change in mating behaviour. These preliminary studies in hamsters and marmosets indicate that antibodies to a prostatic 'inhibin' peptide represent a promising new approach to male contraception.

Effect of antibodies to human seminal plasma inhibin on spermatogenesis and sperm agglutination in adult male rats

In vitro incubation of rat epididymal sperm with antiserum to human seminal plasma inhibin (As hSPI) caused agglutination of the sperm. In vivo administration of As hSPI to adult male rats resulted in a significant decrease in testicular as well as epididymal sperm counts. Furthermore, the majority (almost 90%) of the epididymal sperm were agglutinated. When these animals were mated with normal cycling females, significant reduction in fertility was observed.