Hello, actually it is good that I looked at this again because I mis-spoke in my first post. The egg cell is not a zygote until it is fertilized. Each cell starts out with 23 pairs of chromosomes. For the egg cell, the chromosome pairs are copied once and the cell divides, then it goes through meiosis where the chromosomes do not replicate themselves and instead of 23 pairs of chromosomes, the 4 resulting daughter cells have 23 individual chromosomes. So, because of meiosis, if an egg cell were to replicate, it would still only be capable of producing 23 individual chromosomes instead of the 23 pairs needed for a body cell.
I hope this answers your question.
so based on what you just wrote, how would you summarize that? why scientists can't just take the egg cell, with its own nucleus intact, and shock it to begin cell division