First, the notion that conception is some kind of gift is off base. Where does that come from?
Conception is the joining of a sperm and egg, with the resultant proliferation of cells that develop into a human body. Where's the gift, specifically?
And, more importantly, why would anyone call that joining a gift?
So, to the first question, it is bogus. No one receives the gift of conception.
Second, why would anyone compare the creation of a human life with salvation, which leads to regeneration, or spiritual life? What verse or passage supports such a comparison?
Regeneration isn't a gift, which is missed by the OP. It's an action of God whereby the human spirit is regenerated in order for the Holy Spirit to have a dwelling place in the believer, and allows the believer proper worship (Jn 4:24) of God. Those without a human spirit cannot worship God properly. And there is no place for the Holy Spirit to reside apart from a human spirit.
Can anyone imagine the Holy Spirit residing in a garbage dump? Or cess pool?
No, that's why God regenerates the dead (Eph 2:1) human spirit.
Finally, the OP's last statement is also false, by equating regeneration with salvation. They aren't the same. They occur together, but are different concepts.