PLASMA PROGESTERONE, ANDROSTENEDIONE AND TESTOSTERONE CONCENTRATIONS IN FREEMARTIN HEIFERS

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Authors:
N. SABA
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N. F. CUNNINGHAM
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, and
P. G. MILLAR
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DOI:
https://doi.org/10.1530/jrf.0.0450037
Volume/Issue:
Volume 45: Issue 1
Page Range:
37–45
Article Type:
Research Article
Online Publication Date:
Oct 1975
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Summary.

Plasma concentrations of testosterone, androstenedione and progesterone in freemartins, and normal cyclic and non-cyclic heifers were studied. The plasma testosterone concentrations were in general <10 pg/ml in all animals. The mean androstenedione concentration of 28 pg/ml in 10- to 12-month-old freemartins was significantly lower than the mean of 58 to 60 pg/ml for normal 10- to 12-month-old heifers. At 24 months of age the mean androstenedione concentration in the freemartins had risen significantly to 65 pg/ml.

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Print ISSN:
1470-1626
Online ISSN:
1741-7899