fertilization

fertilization /fur′tilīzā″shən/ [L, fertilis, fruitful] , the union of male and female gametes to form a zygote from which the embryo develops. See also in vitro fertilization, oogenesis, spermatogenesis.

Fertilized human egg (Greer et al, 2001)
Fertilization cycle (Black and Hawks, 2009)

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