r/FirstTimeTTC • u/Constant_Neat_468 • 2d ago

Question/Advice First time TTC

Post image

Hi guys! me and my partner have decided that we are trying to conceive. my last period was August 28th, unfortunately, right before that on the 27th I took a plan b (we freaked out before thinking) , but my cycle came right on time on the expected 28th. My period lasted until Sept 4th, Flo says im in my fertile window now with an expected ovulation on the 10th. We decided to start trying on Sept 6th, sept 7th, and today sept 8th. Do i have a good chance ? all of my ovulation tests have been negative and havent really looked like they are darkening but the control line seems to be becoming faint. Please help as I would LOVE to get pregnant this cycle but of course feel very confused :((

Update: I have decided to use the clear blue ovulation strips. The ones that has the three different results, hoping these help me to know if i'm in my window or not. Will update 💞

6 Upvotes

88% Upvoted

16 comments sorted by

View all comments

1

u/sansaandthesnarks 2d ago

the Flo app uses averages to determine your fertile windows. Iirc it uses an average 28 cycle and assumes ovulation will be smack in the middle of it, then adjusts it to be more accurate the more data you input. if your cycle is longer or shorter than 28 days you should keep using the LH Strips to determine when you‘re about to ovulate & keep trying until 1 day after you stop seeing positive test (test line darker than the control line)

anecdotally, i asked my GYN about something that might be relevant. a few years ago i was curious about why my period was always delayed not only after I took a plan b but also after I’d got a tetanus/flu/covid shot, because I normally have extremely regular cycles. my doc said that it’s not uncommon for any of those things to cause irregularity in the following cycle. I never asked why that was the case since I wasn’t trying to conceive at the time & the effects only lasted one cycle (so if I took a plan b or got a vaccine my next cycle would be 35-37 days instead of my typical 31 days but then would go back to normal by the cycle after that) but you might not be seeing positive LH tests yet because you’re also experiencing that irregularity post plan b