<unk>  is the introduction of sperm into the female uterus of a mammal or the oviduct of an oviparous (egg-laying animal) during copulation with another animal.
Artificial<unk>  is when it is done by some means other than copulation.
Insemination
Avolition
Anise
Exaptation
Adaptive behavior
Attachment 
Impaction
Withdrawal