{"title":"Serum FSH, LH, and testosterone concentrations in presumably fertile men: effect of age.","authors":"K H Tennekoon, E H Karunanayake","doi":"","DOIUrl":null,"url":null,"abstract":"<p><strong>Objective: </strong>Delineation of change in male hormone and gonadotropin levels from age 21 to 85.</p><p><strong>Subjects: </strong>Healthy married volunteers with one or more children.</p><p><strong>Methods: </strong>A 5-mL venous blood sample, serum separated within one hour; testosterone measured by direct RIA, FSH and LH by immunoradiometric assay and magnetic separation.</p><p><strong>Results: </strong>FSH significantly higher from 6th decade, LH from 7th decade; testosterone lower from 6th decade.</p><p><strong>Conclusions: </strong>Apparently, a rise in FSH and reduction in testosterone precede a rise in LH concentration.</p>","PeriodicalId":13990,"journal":{"name":"International Journal of Fertility","volume":"38 2","pages":"108-12"},"PeriodicalIF":0.0000,"publicationDate":"1993-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Fertility","FirstCategoryId":"1085","ListUrlMain":"","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Objective: Delineation of change in male hormone and gonadotropin levels from age 21 to 85.
Subjects: Healthy married volunteers with one or more children.
Methods: A 5-mL venous blood sample, serum separated within one hour; testosterone measured by direct RIA, FSH and LH by immunoradiometric assay and magnetic separation.
Results: FSH significantly higher from 6th decade, LH from 7th decade; testosterone lower from 6th decade.
Conclusions: Apparently, a rise in FSH and reduction in testosterone precede a rise in LH concentration.
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