Which of the following approches does not give the defined action of contraceptive?
A. Barrier methodsprevent fertilization
B. Intrauterine - Increase phagocytosis devices of sperms, suppress sperm motility and fertilizing capacity of sperms
C. Hormonal Prevent/retard entry of contraceptives sperms, prevent ovulation and fertilization
D. Vasectomy - Prevents spermatogenesis
