This is called parthenogenesis. Parthenogenesis is a form of reproduction where an egg develops into an embryo without being fertilized by sperm. This occurs naturally in some animal species, such as certain insects, reptiles, and fish.
Parthenogenesis in humans is extremely rare and has only been observed in a few cases. It is not a viable method of reproduction for humans, and it is not considered a form of natural pregnancy.
While parthenogenesis in humans is possible, it's important to note that it is not the same as a virgin birth as portrayed in religious texts. In parthenogenesis, the egg develops into an embryo without sperm, but it still originates from the mother's own genetic material.