To control the human population, many birth control methods can be used, such as hormonal method, i.e., use of contraceptive pills (oestrogen and progesterone are main constituents), mechanical prevention method i.e., use of IUCDs (Intra Uterine Contraceptive Devices), surgical sterilization methods, like tubectomy (surgical removal of fallopian tubules) or vasectomy (surgical removal of vas deferens).