Hosack D A, Miller K V, Ware L H, Mashburn K L, Morrow C J, Williamson L R, Marchinton R L, Monfort S L
School of Forest Resources, University of Georgia, Athens 30602, USA.
Theriogenology. 1999 May;51(7):1333-42. doi: 10.1016/S0093-691X(99)00077-1.
The impact of male presence or absence on the timing of the preovulatory LH surge and estrus was studied in 3 experimental groups (n = 6/group) of Eld's deer hinds pretreated with intravaginal progesterone-releasing devices (CIDR-type G) as follows: Group 1 = indirect male contact barn; Group 2 = direct male contact barn; and Group 3 = male isolation barn. For all hinds, the duration of the preovulatory LH surge averaged 2.5+/-0.5 h, whereas mean peak preovulatory and basal LH concentrations were 2.9+/-0.2 ng mL(-1) and 0.27+/-0.03 ng mL(-1), respectively. Nine of 12 male-exposed hinds exhibited a preovulatory LH surge within 24 to 32 h postCIDR device withdrawal, whereas 0 of 6 male-isolated hinds exhibited a preovulatory LH surge during the same time period. Onset of behavioral estrus (45.2+/-2.3, 52.7+/-5.7 and 66.3+/-1.8 h, respectively) was significantly advanced (P<0.05) after CIDR device withdrawal in male exposed hinds (Groups 1 and 2) compared with male isolated hinds (Group 3). These data suggest that stag exposure is important for modulating the timing of the preovulatory LH surge and behavioral estrus after synchronization of estrus with exogenous progestagens.
在3组（每组n = 6）经阴道植入孕酮释放装置（CIDR - G型）预处理的坡鹿母鹿中，研究了雄性存在与否对排卵前促黄体生成素（LH）峰出现时间和发情的影响，分组如下：第1组 = 间接接触雄性的畜舍；第2组 = 直接接触雄性的畜舍；第3组 = 雄性隔离畜舍。对所有母鹿而言，排卵前LH峰的持续时间平均为2.5±0.5小时，而排卵前LH峰值浓度和基础LH浓度的平均值分别为2.9±0.2 ng/mL和0.27±0.03 ng/mL。12只接触雄性的母鹿中有9只在取出CIDR装置后24至32小时内出现排卵前LH峰，而6只雄性隔离的母鹿在同一时间段内均未出现排卵前LH峰。与雄性隔离的母鹿（第3组）相比，接触雄性的母鹿（第1组和第2组）在取出CIDR装置后，行为发情的开始时间（分别为45.2±2.3、52.7±5.7和66.3±1.8小时）显著提前（P<0.05）。这些数据表明，在使用外源孕激素使发情同步后，雄鹿接触对于调节排卵前LH峰出现的时间和行为发情很重要。
