Parthenogenesis (a form of asexual reproduction where growth and development of embryos occur without fertilization) has been scientifically observed to happen in other living species or at least that is what researchers of biology claim, also in species that 'normally' reproduce sexually.
Also: 'Parthenogenesis may be achieved through an artificial process as described under the discussion of mammals.' [SEE http://en.wikipedia.org/wiki/Parthenogenesis ] ; artificial research in the field of human reproduction takes place.
How can we humans with a given lifespan in time and limitations on what we know and are able to know be sure that parthenogenesis with male offspring could never occur within a human mother because we have not yet scientifically observed the phenomenon or have no scientific proof or record at this moment of this phenomenon in a human being. Shouldn't we take caution to make claims about human virgin birth being impossible ?
Our Creator is the 1 ALL KNOWING : Knowing what angels couldn't comprehend about the creation of the human being and also what we don't know.