[This](https://www.google.co.in/amp/www.bbc.co.uk/news/amp/37337215) article says that scientists were successful in making a mouse using only a sperm and no egg (ovum). The article also states that this procedure could be applicable to humans.

However, I want to know why didn't they try with only an ovum?

**Can a human be made only with an ovum, i.e. without sperm?**