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Beta Doubling Question

icedcoffeeluvicedcoffeeluv member
in Pregnant after IF

If you have more than two betas should your third doubling time be counted from the first beta or the second beta?

The reason I ask is that I got my 3rd beta number yesterday and its making me really nervous.

08/18 #1 213

08/25 #2 1781

08/29 #3 2955

The first doubling time was 54.83, however my third calculated from the second is around 131 doubling time which is way out of the normal range. However if I calculate from beta 1 it is around 68 which is within the normal range.

My nurse said the number looked fine so I feel I should trust them and that they know what they are looking for. Its so hard not to overanalyze everything.

Thanks for the support here. I haven't been around much and I know I have been pretty selfish with my questions but I really appreciate the advice.

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Re: Beta Doubling Question

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    kthappy76kthappy76
    Doubling from one to the next in 2-3 days is a very rough guideline.  The rise will slow as you go on.  If you are in the range of normal (check betabase), I would not worry.  Soon an u/s will give you much more useful info.  GL!
    TTK 9/06 / TTC 10/08 / Twins 12/11 / Life Blog
    5 REs + 3 surgical hysteroscopies for septum/lap + 3 failed IUIs
    IVF w/ICSI/AH & acu = BFP!, unexplained spontaneous m/c @ 8w2d (our little girl),
    FET w/acu = BFP!, B/G twins!, lost MP @19w, dx w/funneling cervix @20w,
    twins nearly lost to IC @21w, saved by rescue cerclage, 17P & 16w of bedrest
    Our twins born @36w4d via CS when A came foot first

    Thankful for every day

    Baby Birthday Ticker Ticker

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    JessireeJessiree

    Betas slow down once they start getting high. This chart might help reassure you:

    "Normal" Doubling Time
    hCG levels Doubling Time
    Under 1200 mIU/ml 31-72 hours
    Between 1200 to 6000 mIU/ml 72-96 hours
    Over 6000 mIU/ml more than 96 hours

    ETA: Like the PP said, now that you are above the 2,000 mark, an u/s is much more reliable indicator of how things are going. GL!

    After TTC with IR PCOS:
    April 2011: Metformin 1500mg + Clomid 100mg + Ovidrel + Prometrium = BFP!
    Beta #1 at 14DPO: 197 Beta #2 at 18DPO: 1296
    At 40w6d, our Team Green surprise came by unplanned C-section and changed our lives forever!

    Lilypie First Birthday tickers
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    may2806may2806 member
    Like pp said, betas slow as you get higher. I think you're fine! When is your u/s?
    Dx: High FSH, stage IV endo, homozygous C677T MTHFR and PAI-1
    Early loss 10/08
    Lap 1/09
    IVF #1 "natural IVF" - 1 egg retrieved, missed m/c
    Tried several mini-stim cycles with no response
    Switched clinics - dx'd as carrier for Fragile X
    IVF #2 MDL protocol Jan/Feb converted to IUI, BFN
    IVF #2 take 2: Antagonist, one embie, BFN
    IVF #3: Antagonist, no fertilization
    One last ditch effort at OE IVF (antagonist with Clomid) cancelled
    DE cycle #1 Jan/Feb 2011, BFP, ectopic
    DE cycle #2 June/July 2011 - BFP
    10/28/11 Baby girl lost at 17 weeks due to pre-term labor. We love and miss you.
    DE cycle #3 June/July 2012 - BFP, twins, both heartbeats stopped, D&C
    2 frosties but don't know what's next
    FET Dec 2012: BFP! Praying this one sticks for the long haul!
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    icedcoffeeluvicedcoffeeluv member

    Thanks for the reassurance ladies. I hate that I can't just not let it bother me and go with the flow. I'm so not a go with the flow person!

     First US is a week from Thursday (9/8) I will be 7wks 1 day.

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    cbubbles2cbubbles2
    Just wanted to say congrats! Your betas look good to me.
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    LaneCALaneCA

    imagecbubbles2:
    Just wanted to say congrats! Your betas look good to me.

    ditto! I know it is sooo hard to wait for an u/s -- I hope the next week goes by quickly for you :)

    TTC since 8/09
    DX: PCO, ENDO, High NK, MTHFR
    8/10 = Lap to remove Endo

    2 Femara TI, 3 Follistim IUI = BFN & 1 c/p
    IVF #1 - BFP - boy/girl Twins!

    Ben and Reese born at 34w2d!
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    99luftballoons99luftballoons
    Looks good to me... my RE doesn't even do a 3rd beta, we go straight to u/s. Good luck, keep us posted!!
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