Any such outcross matings were to be carefully monitored. In "L. braziliensis" matings in nature are predominantly between related individuals resulting in extreme inbreeding. Ethical breeders hip score the parents before any matings. Some females may also physically choose from among spermatophores taken from multiple matings. The Canadian Wildlife Service noted that grizzly-polar hybrids born of zoo matings have proven fertile. Mothers will help their sons get more matings from females in oestrus. Males of most species survive a few matings, limited mainly by their short life spans. The flies undergo multiple matings, which benefits both sexes. Software is also available to assist breeders in determining the likely outcome of matings. Sometimes, females choose not to struggle and simply acquiesce to forceful matings. The term polygamy is an umbrella term used to refer generally to non-monogamous matings. Dominant females procure more food, matings, and supporters. Therefore, benefits from engaging in multiple short-term matings must also exist for females. The most dominant males get the first matings. Males seem to alternate between the left and right hemipenis on successive matings.