A miscarriage is both a physical and an emotional process, regardless if you miscarry naturally or have medical assistance.

If you switched to pregnancy mode in the Ava app and you don't want to see the pregnancy content anymore, you can switch back to TTC (Trying to Conceive) mode in the Ava app right away. When the app asks you for the date of your last menstrual period, choose “I don't know”.
When you are pregnant, the pregnancy hormone hCG is elevated and it can take some time until this hormone level drops. hCG is the hormone that pregnancy tests detect and suppresses your normal menstrual cycle. Until it drops below 5, your next cycle will not start.

Falling hCG levels don't necessarily correlate with when you experience bleeding. You might bleed for a few days or weeks but still have relatively high levels of hCG in your system.
If you feel it would be upsetting to take pregnancy tests following a miscarriage, then you can totally skip it! You can continue wearing your Ava at night, sync it in the morning, and wait until your next period to enter this into the app to establish your CD (cycle day) 1.

You won't get a fertile window or ovulation prediction for this first cycle post-miscarriage but you could still watch your temperature and RPR (resting pulse rate) patterns to figure it out for yourself.
If you are using pregnancy tests to determine if your hCG levels have dropped but are still getting positive tests, when the Ava app asks you when your last menstrual period was, select “I don't know”.

You can take a test every few days until you get a true negative before selecting the + symbol in the app to enter a “period” on that day to mark it as CD1 - even if this isn't the day that your bleeding starts.

You may have heard that some women experience long cycles after a miscarriage. If you start your CD1 on the first day you get a negative pregnancy test, it's possible that you will ovulate around your usual time.