Parnogenesis is a form of asexual reproduction that involves development of female gamete into a new individual without being fertilized by a male gamete. In certain animals, parnogenesis occurs regularly, constantly and naturally in ir life cycles and is known as natural parnogenesis. It is seen in honeybees, some fishes, gastropods and nematodes.

Parnogenesis is a natural form of asexual reproduction in which growth and development of embryo occur without fertilisation. It can occur without meiosis  i.e., division to form haploid cells. Mature egg cells are formed by mitotic division of ovary or somatic cells and se cells directly develop into embryos. In flowering plants, cells of gametophyte can undergo this process. The seeds thus formed are viable and produce exact replica or clone of ir mor.