Pregnancy is a biological function, a period within the process of reproduction of many species in which a member of the species carries their developing offspring internally until they are ready for birth.
Gorn babies were born live, as opposed to hatching from eggs. They were vicious from birth. ( TOS video game: )
Ferenginar, pregnancy is considered a rental, with rental agreements being signed by would-be Ferengi parents. ( DS9 episode: " Nor the Battle to the Strong", DS9 novel: )
Legends of the Ferengi
April 2376, during her pregnancy, Kasidy Yates developed a craving for anything made with ginger, such as gingerbread. ( DS9 novels: , Avatar, Book One )
Avatar, Book Two
Cumin, the son of the farmer Hommun on The Armada, complained to Wesley Crusher in 2365 about his chores on the farms, which included sleeping with the farm's lizards when they were pregnant. ( TNG comic: " Space Seeds")