Thethree types are :
i] MECHANICAL METHODS: Condams and diaphram ar being used to prevent the meeting of sperm and the ova.
ii]. CHEMICAL METHOD: Oral pills changes the harmonal balance of the female oviduct and restricts from releasing of egg
iii]. SURGICAL METHOD: It is used to block the vas deferens in males or fallopian tube (oviduct) to prevent the transfer of sperms or the egg so that there is no fertilization takes place.
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These are the prevention of reproduction which also help in population control.
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