I’m not an expert in stem cells, but I have done some research on my own about this topic. Embryonic stem cells would have to come from an embryo. An unfertilized ovum would not yield embryonic stem cells. However, there are many other sources of stem cells. Stem cells have been found in umbilical cord blood, bone marrow, heart muscle, brain tissue, the pancreas, and in many other locations throughout the body. I don’t know for sure, but it may be possible that unfertilized ova are another source of adult stem cells. In that case, you still couldn’t get embryonic stem cells from the ovum, but you certainly could get real stem cells.
Just a side note: Adult stem cells are already being used to successfully treat a wide variety of diseases, while embryonic stem cells are not even in clinical trials due to a number of problems that occur when using embryonic stem cells. It makes one wonder if the push for embryonic stem cell research might be based in something other than just trying to make other people healthier.