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Thyroid Disorders Message Board
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Old 04-15-2006, 10:34 PM   #1
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tawnyjade HB User
Lab tests...

I think this is what I keep reading...For those of us who take estrogen, it skews with TSH and T4 results. Progestin messes with T3 results. How can we find out what our labs actually mean?
I take Estradiol (pill) and the Depo Provera shot for HRT from the loss of an ovary.
I keep reading that these hormones mess up the lab tests.

Anyone??????

Is this why my labs are"normal"and I still feel so hypo?

My last results:
Free T4 1.1 (0.6-1.7)
TSH 0.44 (0.28-4.02)
T3 Total 103 (77-178)

Thanks!

Tawny

Last edited by tawnyjade; 04-16-2006 at 03:57 PM.

 
Old 04-16-2006, 03:58 PM   #2
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Re: Lab tests and hormones????????

Does anyone take estrogen or depo provera?

 
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Old 04-16-2006, 04:57 PM   #3
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Re: Lab tests and hormones????????

Estrogen can elevate the TOTAL T3 and T4 but NOT the free T3 and T4. It should not affect TSH.

Ellie

 
Old 04-16-2006, 06:49 PM   #4
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Re: Lab tests and hormones????????

Thanks Ellie.
All of this is very confusing to me. My endo says "ask your GP". GP says, "endocrinology is a foreign language to me".
I think I read on the Depo insert to tell the lab if you use Depo (as it messes with T3 #'s). Of course I can't find that again, and I read it after my last labs were done.
Do you think they use different range values if they know you take extra hormones?

Thanks again!

Tawny

 
Old 04-16-2006, 07:15 PM   #5
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Re: Lab tests and hormones????????

No, there isn't a different range, I don't believe. The problem is, the hormones increase hormone binding proteins - including the proteins that bind T3 and T4. Total T3 and total T4 are measures of the bound (inactive) hormones, which function as a storage reservoir. FREE T3 and T4 measures the active form, the unbound form.

So - anyone on birth control pills or other forms of female hormones may have artificially raised total thyroid hormones, but measuring the free form whould give you an accurate picture.

TSH responds to the unbound, free hormones, so female hormones should not affect that.

Ellie

Last edited by ellie342; 04-16-2006 at 07:16 PM.

 
Old 04-16-2006, 07:40 PM   #6
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Re: Lab tests and hormones????????

Ahhhhh.....
Once again, always get the FREE tests, not the TOTAL!

Mahalo!
Happy Easter!

Tawny

 
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