User:Julia halcrow/sandbox

There are two types of monogamy. Type 1, which is facultative and type 2 which is obligate. Facultative monogamy occurs when there are very low densities in a species. This means that mating occurs with only a single member of the opposite sex because males and females are very far apart. When a female needs aid from con specifics in order to have a litter this is obligate monogamy. However with this, the habitat carrying capacity is small so it means only one female can breed within the habitat.

Adding in a citation for one needed in "Mating system": for most mammals, the estrous cycle and its outward signs bring on mating activity; the majority of female-initiated matings in humans coincides with estrous