Name the contraceptive device used by the human males which acts as a sheath over the male organ and traps the sperms in it.

What is the name of surgical method of birth control in human males in which the sperm ducts are cut and ligated (tied) at both ends?

What is the name of surgical method of birth control in human females in which the oviducts are cut and ligated (tied) at both ends?

Name the contraceptive device used by human females which is put over the cervix.

Describe the surgical methods of birth control (i) for men, and (ii) for women.