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Testosterone Replacement, Low T, HCG, & Beyond
Blood Test Discussion
Low estradiol with no anastrozole use: Confused.
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<blockquote data-quote="Dr Justin Saya MD" data-source="post: 59404" data-attributes="member: 12687"><p>Response I received from LabCorp regarding the change:</p><p></p><p>"Thank you for your inquiry into the male reference intervals for progesterone. The range was changed as a result of new progesterone reagent from Roche Diagnostics, the manufacturer of the reagent and the instrument upon which it is performed. The new reagent was developed to improve the specificity at the low end of the progesterone reference range. As a result of this improvement, the upper end of the male range was significantly lower than the previous range due to diminished interference from compounds that could slightly raise male progesterone levels. Hence, the previous range was slightly higher to compensate for such interference. The new range was established by Roche, as was the previous range, and is included in their FDA cleared package insert."</p></blockquote><p></p>
[QUOTE="Dr Justin Saya MD, post: 59404, member: 12687"] Response I received from LabCorp regarding the change: "Thank you for your inquiry into the male reference intervals for progesterone. The range was changed as a result of new progesterone reagent from Roche Diagnostics, the manufacturer of the reagent and the instrument upon which it is performed. The new reagent was developed to improve the specificity at the low end of the progesterone reference range. As a result of this improvement, the upper end of the male range was significantly lower than the previous range due to diminished interference from compounds that could slightly raise male progesterone levels. Hence, the previous range was slightly higher to compensate for such interference. The new range was established by Roche, as was the previous range, and is included in their FDA cleared package insert." [/QUOTE]
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Testosterone Replacement, Low T, HCG, & Beyond
Blood Test Discussion
Low estradiol with no anastrozole use: Confused.
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