So, you’ve decided you’re ready to try for a baby. Or maybe you’re not quite there but want to explore your options for birth control until you are ready.

You thought you understood how this worked, but a quick search online has returned message boards and blogs full of a jumble of letters — TTC, OPK, IUD, BFP. 

What’s the deal with all these abbreviations? While they’re not technical terms used by medical professionals, they’re often used as a shorthand by people talking about fertility and pregnancy online.

Check your knowledge with our quiz below to see how much you already know about the language of FP (family planning) and TTC (trying to conceive!).