Translations:Codex: Humans/15/en

Human pregnancy generally lasts nine months and usually bears only one child at a time, though instances of multiple births are not uncommon, especially among the more fertile. Human infants can see at birth and mature to adulthood biologically at 10-12 years for females and 12-14 years for males, but recognized legally at 18 years of age. Though newborns consist of primarily females and males, there have been rare cases of natural hermaphrodites.