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Conception

Is conception when the sperm fertilize the egg ?
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134578 tn?1693250592
And in case you are wondering, the egg can live 24 -36 hours but if it is not fertilized in that amount of time, it is no longer viable.  

Sperm, by contrast, can live 5-6 days in the woman's system (some research says longer, some says it's not very lively as late as 6 days).

Thus, say a couple has unprotected sex on January 1 only, and the woman ovulates on January 4.  Conception would happen on January 4 or 5, even though they didn't have sex after the 1st.
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134578 tn?1693250592
Yes.  

Ovulation = egg pops out of ovary and begins trip down Fallopian tubes.
Conception = moment sperm unites with egg
Implantation = embryo imbeds in uterine wall

(and 'fertilization' is the same as 'conception.')
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Avatar universal
Its When They Join Together Yes
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