Only a human sperm cell can fertilize a human egg.
While interspecies fertilization is a concept sometimes explored in science fiction, in reality, the genetic differences between humans and other animals are too vast for successful fertilization to occur. Chromosomes from different species are incompatible and cannot combine to create viable offspring.
The provided reference states this clearly: "Humans can only conceive with other humans. Same is true of all animals."
Attempts at interspecies fertilization typically fail at very early stages, if fertilization even occurs.
