Seriously, I kid you not, immaculate conception has absolutely nothing to do with not having a blood spot from the woman loosing her virginity. The word immaculate means spotless, pure, flawless, etc. Its association with Mary and Jesus comes from the Catholic idea of the immaculate conception, ie Mary was conceived immaculately. This does not mean her mom was a virgin, or that her mom did not bleed or anything else like that. And it has nothing to do with the way in which Jesus was conceived. It does not derive from some other etymological meaning, or any like that. Like I said, the word "immaculate" became associated with the word "conception" simply because of the Catholic idea of immaculate conception.