Acronyms??

Hi I'm Anita and I'm new to Glow so I have no clue what any of the acronyms I've been seeing mean. Some if them I get from common sense like TTC as "trying to conceive" or BFP & BFN as "big fat positive/negative" but others I'm not sure. I really like this app but if I can't figure them out I might have to uninstall it :( So if anyw can help me out here would be awesome.