post·fer·til·iza·tion
ˌpōst-ˌfərt-ᵊl-ə-ˈzā-shən
: occurring in the period following fertilization
the early postfertilization stages of embryonic development—N. A. Wivel & LeRoy Walters
: after fertilization
changes occurring 48 hours postfertilization
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Merriam-Webster unabridged
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