Birth control pills have not been shown to get rid of or shrink ovarian cysts that have already formed. Some studies show that the cysts shrink at the same rate with or without birth control pill use.
Chewbacca's voice was created by the original films' sound designer, Ben Burtt, from recordings of walruses, lions, camels, bears, rabbits, tigers, and badgers in Burtt's personal menagerie. The individual recordings were mixed at different ratios for Chewbacca's different utterances.
Marine mammals produce vocalizations using mechanisms similar those of land mammals. Pinnipeds (seals and sea lions) have a larynx similar to that of humans. Baleen whales also use a larynx to produce sounds. Toothed whales can produce sounds using their larynx as well as specialized air sacs near their blowhole.