The dogma of the Immaculate Conception of Mary has nothing to do with biology. It does not mean that she was conceived miraculously in the physical sense. She was normally conceived and born of her parents, Joachim and Ann. But in her very conception her soul was preserved immaculate in the sense that she inherited no stain of original sin, derived from our first parents.
Radio Replies Volume 1 by Rev. Dr. Leslie Rumble MSC and Rev. Charles Mortimer Carty
