Reasons for short LP?

This is my third cycle off BCP, so I know things could still be regulating.  My first cycle my LP was 12 days.  Not bad, but not great.  So CD 1 of cycle #2 I started taking B6 and have every single day since.  Then cycle #2 I had a 14 day LP.  Both these cycles I O on CD 23.  However, cycle #2 my body tried, and failed, to O on CD 16.  I figured my body was wanting to O earlier in my cycle and I'd see how that played out in the future.


This cycle (#3) I O CD 17, which I thought was awesome.  However, I just had a 9 day LP, which means I just had a short 26 day cycle. Could the crazy short LP be due to my earlier O date and my body not knowing what to do with a LP that early in a cycle?  Or could something else be going on that I don't know about?


I don't want to run out to the doctor yet, but we wanted to start TTC in two cycles and of course I keep thinking I'm going to have challenges getting PG.  And the whackiness each cycle doesn't help my concerns.

Posted on May 14, 2013 at 2:29 am
winterbride2011
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(4) Comments

Claire27
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Claire27

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Claire27

Your LP should be the same regardless of when you O.  My LP was 14 days - a couple of times it went 15 days, but 80% of the time it was 14 days.  This did not change if I O'd on CD13 (I'd have a 27 day cycle), CD14 (28 day cycle), CD15 (29 day cycle) or CD16 (30 day cycle).


I'm thinking it may just be a regulation thing.  I would say if you have another short LP, even with the B6 you might want to give your doctor a call.

Posted on May 14, 2013 at 3:12 am
KWoodrn
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KWoodrn

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KWoodrn

I would give it a few more cycles. BC can really screw with your system. I have been off for about a year now and my cycles have just started getting regular the last few cycles. Start temping so you can be sure of your luteal phase length when you go to your dr. However if you can confirm your luteal phase is less than 10 days with the B6 make an appointment. Maybe he can check your progesterone on CD 21 and see if you are ovulating strong enough. GL

Posted on May 14, 2013 at 6:49 am
winterbride2011
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winterbride2011

OK, thanks.  I'll see how my 4th cycle goes and then call the doc immediately if things aren't more regular.  My doctor is big on "go off BC only 3 months before TTC", so I fear if I go to her about my 3rd cycle off BCP she'll tell me it's within that window of my body adjusting. 


@ KWoodrn ~ thanks for the tip of CD 21 progesterone testing.  If I end up going to my doctor over this I'll specifically recommend that.  Is it just a blood test you quickly go for?

Posted on May 15, 2013 at 1:25 am
Claire27
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Claire27

The CD 21 test is just a blood test. Although my dr gave me a window of CD 21- CD25 because I didn't always O on the same day. She said the test had to be done at least 7 days after O to get an accurate progesterone level. We did this test to confirm my levels before doing an HSG. We also tested my LH and FSH levels early in my cycle to estimate my ovarian reserve.
Posted on May 15, 2013 at 1:51 am

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