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  1. #1
    Registered User blue_eyes's Avatar
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    Question Does Metformin affect BBT (temperature)?

    Hi all! I'm new to this site and just recently diagnosed with PCOS. I'm not sure it makes much difference, but I have the "thin" version of PCOS, and due to a family history of PCOS and diabetes, my RE also recommended the South Beach Diet for me. For the last few days, all my signs (CM, o-pains, etc) have been pointing to me ovulating in the next couple days.

    Last night I took my first dose of Metformin (prescribed by my RE since we're TTC). When I took my temp this morning, it spiked above my CL of 97.57 to 97.99!! Could this temp spike really be because I ovulated, or does the Metformin cause your temps to be higher than normal? I'm on CD28 today, and I usually ovulate betwen CD20 and CD25.

    Any insight into Metformin would be greatly appreciated. TIA!!

  2. #2
    Registered User blue_eyes's Avatar
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    Anyone have any experience with this? Well I'm guessing since my temp has stayed up and not spiked again that I really am on 8DPO and that it didn't affect my temperature. Please let me know if you have a different experience. Thanks!

  3. #3
    Tribbles on board AnotherDreamer's Avatar
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    With Metformin I noticed it lowers my temps, and keeps them more steady. I notice a clear temp shift if I Ov with ovulation stimulation drugs.

    So, maybe it is Ov.
    Only one way to find out, you'll either get a visit from AF or a BFP... or ask your doc to test your progesterone to find out if you have Ov'ed for sure.

    Best wishes.
    Stephanie 29 & DH 28 :: Hidden Content
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    Registered User EHR's Avatar
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    Thanks for asking this question - I was wondering the same thing..

  5. #5
    Registered User blue_eyes's Avatar
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    Well I'm now 16DPO and haven't started AF yet. If it doesn't show soon, I plan on testing Friday or Saturday. My temp has definitely stayed up above the CL so I'm pretty sure it was O. Only a couple more days to know for sure. Thanks!

  6. #6
    Registered User blue_eyes's Avatar
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    If there's still someone out there wondering about it, it doesn't look like it affected it. I got a BFP at home on 17DPO and a confirmed beta on 20DPO. Looks like I'm about 5 weeks already!

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    Registered User AJane's Avatar
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    I just started taking Medroxy Progesterone & Metformin. I've also noticed a spike in my Basal Temp. I'm really confused! I've only been taking it for 4 days now and each day my temp increases. Before my temp was 96.6 now it's been 97.0, 96.9, 97.3, 97.5. I've always had a low basal temp. Any thoughts would be helpful! Thanks!!

  8. #8
    Registered User abacalvarywife's Avatar
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    Congrats blue eyes!
    Me (24) DH (29)
    50mg clomid cd5-9 BFP 10dpo
    Betas 41, 104 7-14-10 -TWINS!!!!! HB A 153 bpm
    10-06-10- Team Blue x2!!!!!!! Alexander Sebastian and Max Christian
    1-21-11 Xander and Max are here! 4lb 10oz and 4 lb 11oz (34 weeks gestation, 9 days in NICU)
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