Should I get my female cat fixed?

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To anyone that has a female cat, is it mandatory to get them fixed? My 8 month old cat is not yet fixed but i don’t want to do it just yet. I feel like i should wait it out / not do it at all. I live in an apartment that my cat never leaves so there’s no worry about her leaving and getting pregnant. I feel really bad to do it to her, but i heard that it’s easier to get infections/cancers if it’s not done. Any advice ?