When does the Soul enter the body of a fetus?

For those that believe in souls when does it become created?
When does the Soul enter the body of a fetus?
Conception (egg fertilization)
Heartbeat detected (6 weeks)
Birth (first breath)
It always existed before and will exist after death
Some other moment (say when)
I don't believe in souls
Select gender and age to cast your vote:
When does the Soul enter the body of a fetus?
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