TY - JOUR
T1 - Effects of hemicastration and unilateral vasectomy on the remaining gonad and on the FSH, LH and testosterone blood concentration in bulls
AU - Leidl, W.
AU - Braun, U.
AU - Stolla, R.
AU - Schams, D.
PY - 1980
Y1 - 1980
N2 - The effects of unilateral castration and vasectomy on the weight and microscopic appearance of the contralateral testis and on the blood levels of testosterone, LH and FSH, were studied in German Fleckvieh bulls. Testicular weights were higher in hemicastrated bulls (P < 0.01) and unilaterally vasectomized bulls (P < 0.05) when compared to controls, 377 ± 45g (x ± s, N = 4 and 281 ± 12g, N = 4 vs 226 ± 38g, N = 3, respectively. Testosterone concentrations were higher during the weeks 14 to 22 after surgery in both treated groups. LH levels were not different from controls, but FSH levels increased significantly (P < 0.01) two weeks after hemicastration and unilateral vasectomy. Different factors appear to regulate the LH and the FSH concentrations in bulls. The increase of FSH after hemicastration may indicate a reduced production of inhibin or an inhibin-like substance from the testes, and a similar increase after unilateral vasectomy suggests that this substance may be resorbed distal to the testes.
AB - The effects of unilateral castration and vasectomy on the weight and microscopic appearance of the contralateral testis and on the blood levels of testosterone, LH and FSH, were studied in German Fleckvieh bulls. Testicular weights were higher in hemicastrated bulls (P < 0.01) and unilaterally vasectomized bulls (P < 0.05) when compared to controls, 377 ± 45g (x ± s, N = 4 and 281 ± 12g, N = 4 vs 226 ± 38g, N = 3, respectively. Testosterone concentrations were higher during the weeks 14 to 22 after surgery in both treated groups. LH levels were not different from controls, but FSH levels increased significantly (P < 0.01) two weeks after hemicastration and unilateral vasectomy. Different factors appear to regulate the LH and the FSH concentrations in bulls. The increase of FSH after hemicastration may indicate a reduced production of inhibin or an inhibin-like substance from the testes, and a similar increase after unilateral vasectomy suggests that this substance may be resorbed distal to the testes.
UR - http://www.scopus.com/inward/record.url?scp=84970562781&partnerID=8YFLogxK
U2 - 10.1016/0093-691X(80)90002-3
DO - 10.1016/0093-691X(80)90002-3
M3 - Article
AN - SCOPUS:84970562781
SN - 0093-691X
VL - 14
SP - 173
EP - 184
JO - Theriogenology
JF - Theriogenology
IS - 3
ER -