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If you had a normal 28 day cycle

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in 1st Trimester

and know within 2 days when you ovulated, was "your" due date the same as what the doctor said your due date was based on u/s measurements? I hear of sooo many women saying that their due dates were a week different then what the doc said after doing an u/s so I was just wondering. I have a normal 28 day cycle and am 90% sure I ovulated on day 14 so I am assuming my due date should be accurate right?

 I know in the long run it really makes little difference but right now everyday is huge!!! LOL

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Re: If you had a normal 28 day cycle

  • sucrets4sucrets4 member
    How do you "know" when you ovulated?  Do you have proof, like opk or temps?
    BFP(1) DD1 born 4.17.10 @ 33w5d due to pPROM
    BFP(4) DD2 born 2.14.13 @ 35w5d due to pPROM

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  • CaitlinJ22CaitlinJ22 member

    this cycle was 28 or 29 days, but before that was 22 (I BF) so I have no clue, though I think I O'd around the 28th of Sept. Either way, im going by my LMP and that puts my EDD 6/21.

    With DS I knew when I O'd give or take a day, and it put me 4 days earlier than my EDD based on my LMP. Well I had Finn 5 days before my LMP EDD. SO even though the doc said my EDD was later, I still had him around the EDD I had in my mind based on conception. It all equals out eventually.

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  • carrotcake06carrotcake06 member

    EDD calculators based on LMP  (and your doctor for that matter) use CD14 as your O date.  So yes, if you ovulated on that day it should be "accurate".

    FWIW, I have a due date from my dr, but I don't use it.  It's not what my ticker is based off of or what I tell people when they ask how far along I am.  

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  • sassafras007sassafras007 member

    I used a ClearBlue Easy Monitor and I am pretty sure I know when I ovulated...

    I have a 30 day cycle.

    My DD is April 17, 19, 22, or 25...

    It keeps chaning...

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  • PamelaCPamelaC member

    Based on LMP, my EDD is May 28th.

    Based on ovulation day, my EDD is May 31st or June 1st.

    At my u/s yesterday, the baby measured perfectly for my ovulation day.  However, my dr. doesn't change the due date unless it is more than 5 days different from the LMP due date.  So we're sticking with May 28th.  Ok by me.

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  • JennicapJennicap member
    See my chart, I'm right on target with my midwife's office.

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  • rachelbeth85rachelbeth85
    I have no idea when I ovulated (pregnancy was a suprise). But when I went in for my u/s at 9wks, the baby measured exactly 9wks. So the original due date, that was set by the first day of my last period, was dead on.
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  • bliss611bliss611 member

    My LO was measuring 3 days smaller than the due date we calculated. And I had IUIs AND was temping the cycle we conceived so no doubt about when I O'd and conceived.

    Doc didn't change my due date but said it can be off by this much because of implantation timing

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