thread: Calculating due date from date of ovulation - silly question help!

  1. #1
    BellyBelly Member

    Sep 2007
    Queensland
    1,137

    Calculating due date from date of ovulation - silly question help!

    So, how (for example, hypothetically speaking ) have just come off contraception and haven't had a period yet, how could I date my pregnancy?

    I think I know when I ovulated (16th of Jan) from my symptoms and I may have had something som spotting on 25/26 Jan. But I don't know my cycle length!?!?

    We are using condoms , so I'd be very suprised if I am pregnant but I'm just wondering...

    TIA for your help!

  2. #2
    2013 BellyBelly RAK Recipient.

    May 2007
    Brisbane
    5,310

    Assuming you have a 28 day cycle, count 14 days back fromthe date of ovulation and use that as the LMP date. It's 40 weeks from there.

    But I think the BB due date calculator (link at the top "pregnancy tools") does from ovulation too.

    HTH! Hope you get your BFP!

  3. #3
    Registered User

    Mar 2007
    6,900

    You should have AF by now!! If that is when you ovulated...are you sure?
    Do a hpt!!
    If you know when you ovulated use the due date calculator and put in the day of last AF as 2 weeks before O date. Then say you have a 28 day cycle and 14 day LP. That will give u an estimate.

  4. #4
    BellyBelly Member

    Sep 2007
    Queensland
    1,137

    Argh!

    No, i'm not sure that's when I ovulated but I did have a quite a bit of stringy CM, which I never had while on implanon (sorry if TMI!) I only had my implanon out on 11/1 and I was waiting for my first period before I started charting.

    So many conflicting emotions now!

    Thanks for your help girls! I don't know if I want to waste the money on a HPT... my cycles have been erratic in the past and I've only just gotton off the implanon and we've been using protection...

  5. #5
    BellyBelly Member

    Sep 2007
    Queensland
    1,137

    Nope, false alarm. I just did a HPT and it's a negative. Mostly happy as timing was quite right but also disapointed... now I wonder what is causing my naseousness...?
    But now I know for next time!

  6. #6
    Registered User

    Mar 2007
    6,900

    Sorry about the bfn Ruth, it's hard not to get a little excited when you have symptoms hey?
    Not long to go until you're TTC now!!

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