PLASMA LUTEINIZING HORMONE AND TESTOSTERONE IN THE ADULT MALE PIG: 24 HOUR FLUCTUATIONS AND THE EFFECT OF COPULATION

摘要: Secretory patterns of LH and testosterone were characterized in the intact male miniature pig. All blood samples taken from indwelling catheters. Hourly sampling was carried out over 24 h during a morning period collected for 2 at 10 min intervals. No significant difference detected plasma concentration on basis hourly sampling. Plasma significantly (P less than 0-05) lower evening night when compared with values. The second experiment concerned pattern concentrations before after copulation. Blood performed 0-001) raised 30 copulation any (0-120 min) not altered (0-270 min). data are interpreted as possible mechanism endocrine control testicular function.