We already had this discussion in another thread.
correction… there are some significantly different issues raised in your question. Besides the incorrect use of “immaculate conception” (which beaglelady has pointed out), I don’t know if anyone suggested embryo implantation in the other thread. Embryo implantation is way too magical for me. I can see God arranging pregnancy in a virgin for that is only unlikely not impossible according to the laws of nature. I don’t believe in God trashing the laws of nature He created, and I frankly don’t see any necessity. It buys into the excessive preoccupation with genetics as if that is what makes the difference between good and evil. It connects with racism and eugenics. It replaces the teaching of Jesus being 100% human with Jesus being something genetically designed by God. It might fit well with creationist ideas of a special creation of Adam but not with evolution.