Human<unk>  is the<unk>  in humans. It is the union of a human egg and sperm, usually occurring in the ampulla of the fallopian tube. It is also the initiation of prenatal development.<unk>  constitutes the penetration of the oocyte which the sperm performs, fusion of the sperm and oocyte, succeeded by fusion of their genetic material.
Fertilization
Fermentation 
Reproduction
Extraction 
Inoculation
Secretion
Stacking 
Agglutination