Some creatures can procreate by a process called parthenogenesis, sometimes called "virgin birth," especially some species of fish, insects, and reptiles. Females can procreate through parthenogenesis without having to mate with a guy. Rather, without sperm fertilizing the egg, the female's egg grows into an embryo.
A few explanations account for the occurrence of parthenogenesis in particular animal species:
The first is adaptation to the surroundings
In settings when mates are few or unreachable, parthenogenesis can be beneficial. Asexual reproduction allows females to guarantee the continuation of their genetic heritage even in the lack of a mate.
The Reproductive Advantage
Because parthenogenesis spares females the time and energy needed for mating and courtship, some species can reproduce quickly.
Biological Diversity
While parthenogenesis results in genetically identical progeny to the mother, certain species have evolved means of introducing genetic diversity. For instance, in some reptiles genetic recombination can take place throughout the egg-development process, producing genetically diverse progeny even in the absence of fertilization.
Strategic Evolution
In reaction to particular ecological or evolutionary challenges, parthenogenesis might have developed as a reproductive strategy. Under some circumstances or in some ecosystems, it might offer a survival advantage.
Note that while parthenogenesis is somewhat uncommon in vertebrate creatures, it is more frequent in invertebrates including insects, some fish, and reptiles. Furthermore, not all kids born during parthenogenesis are female; certain species include systems that enable the process to create both male and female progeny.