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False Positive OPK on Femara?

Hello ladies! Just wondering if anyone has any experience with Femara (letrozole)....just finished my 1st round (after 3 rounds of clomid) and got a positive OPK on Sunday (CD8)....that would be waaaay early for me (usually O'd on CD 24-25 with Clomid)....ever heard for false positives on Femara? I've been checking online, but everything I've found said that Femara shouldn't have any false +.... I'll be going in this afternoon for an U/S, just wondering if any of you had a similar experience...?


User Image Me-PCOS since 1997 DH-low morph 18% Off BCP since April 2010 Started Metformin (1500mg) April 2011 May 2011-Clomid 50mg--no ovulation, BFN June 2011-Clomid 100mg-late ovulation, BFP, chemical July 2011-Clomid 150mg-late ovulation, B2B IUI, BFN August 2011-Femara 5mg-ON TIME ovulation, IUI, BFN September 2011--Femara 5mg, ON TIME ovulation, B2B IUI, BFN October 2011-HSG Test--CLEAR!, no Meds.... November 2011-New RE December 2012-Clomid/Follistim/Trigger B2B IUI, BFN January....off due to big ol' cyst. BCP. Sonohystogram-clear! February 2012-Follistim (1 folli--grr!), Trigger, B2B IUIs, BFN March 2012-cyst. Grrr. On BCP for 10 days Coooome oooooon baby!!!!

1 Answer • 12 years ago


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I started testing with opks's on cd12 as I always o on cd16. It was a positive, and I suspect I missed o and it happened that day. I have read that femara makes you o early, and I agree with you that cd8 is early, but it could be. I'm going to start testing before I finish this round to see what happens and if I get a false positive. Good luck to you!

11 years ago


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