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January 2015 Moms
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Online calculators all different

emzeebobemzeebob member
in January 2015 Moms
So all these online calculators for due dates an phone apps are given me different dates :/ haven't got midwife app for another 4-5 weeks so am a little confused my lmp was the 16th April and I have 33 days cycles xx
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Re: Online calculators all different

  • vjdk07vjdk07 member
    Not all of the apps take into consideration the length of your cycles. A lot of them assume you have the perfect 28 day cycle.
    Me: 31 DH:36
    DSS: 15 DS: 7
    DD born 1/3/15


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  • JacieBeeJacieBee member
    If you didn't track your BBT or have u/s monitoring to pinpoint ovulation,  I'd just stick with EDD based on lmp until your doctor or midwife gives you something different.  Likely the dates will be fairly close and since most babies aren't born on their due dates, having an exact date won't make much of a difference.  Also, I've heard many doctors only adjust due dates if they are a week or more off from the lmp calculati
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  • JacieBeeJacieBee member
    *calculation.  I seriously need to stop trusting my tablet's autoc8mpl
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  • MaPetiteFamilleMaPetiteFamille member
    Most luteal (post-ovulation) phases are 14 days. It's really the follicular (pre-ovulation) phase that varies from one woman to another. So 33-14= ovulating on day 19 of your cycle. If lmp is 4/16 you probably ovulated around 5/4, which would put you around 4w6d with an EDD of 1/25. Obviously if your cycles vary this might not be accurate, though.
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  • emzeebobemzeebob member
    Thanku x
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  • MaPetiteFamilleMaPetiteFamille member
    Yes, there's always going to be some variation. We're talking estimates and obviously temping is the only way for her to know for sure. And in OP's case, it's really only a matter of a few days' difference. In my own case, my FP is 23 days long (37 day cycle). It'd be rare to see that much variation in a LP. More interesting info here: https://uk.clearblue.com/sites/default/files/HCP_Publications/Articles-Pregnancy/Variability_in_length_of_menstrual_cycles_within_and_between_women.pdf
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