Reproduction is fundamental function of all organisms, and all the living world that surrounds us is the result of it. Whether it's sexual or asexual type of reproduction, the goal is always the same: to create an offspring and thus ensure extension of one own species. Sexual reproduction and parthenogenesis have their own advantages and disadvantages. Sexual reproduction requires a great deal of time and it results in fewer of offspring. These offspring have new gene combinations which provide them better adaptation to environmental conditions and exploatation of diverse ecological niches. Although parthenogenesis results in offspring with reduced genetic diversity, it does have some advantages over sexual reproduction. The advantage of parthenogenesis is that organisms can reproduce rapidly and it doesn't require the presence of the males. Parthenogenic organisms also produce a greater quantity of offspring. Both of these methods together with all their benefits and drawbacks exist among diversed animal species. Although sexual reproduction is the most common form of reproduction, reproduction by parthenogenesis is important component in life of some species. Obviously, the advantages that parthenogenesis offers are more than satisfactorily to these organisms. In accordance with that is the fact that parthenogenesis maintaines by them in spite of possibility of sexual reproduction.