Most Christians believe that that was not some biological process, but a true miracle where God himself bestowed this child on Mary. It would be technically correct that this was parthenogenesis, but it is a completely different... mechanism.
Most non-Christians, even if they believe Jesus was a true historical figure, do not believe that his mother was a virgin.
Most non-Christians, even if they believe Jesus was a true historical figure, do not believe that his mother was a virgin.