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利用同步发情和排卵提高繁殖率是农业科研工作者长期以来的奋斗方向。作者检查了一种促黄体素释放激素(LHRH)高活性类似物在大鼠诱导同步发情的效能。使用体重140～160g的成年雌性大鼠,每晨查阴道涂片以监测动情期。在第一组实验中,将25μgLHRH的高活性类似物(第6位D型丙氨酸,第10位去甘氨酸的LHRH的乙基酰胺)放入一个大约3×3 mm大小,重25mg的小球中,在乙醚麻醉下分别给10只雌性成年大鼠每鼠颈部皮下埋植一个小球。10只对照动物只做假手术。术后观察动情周期的变化。第二组实验中,也分为实验组及对照组,处理同实验一组。在除去皮下埋植的小球或假手术(对照组)后的第三天,第四天及第五天,将两
The use of synchronous estrus and ovulation to increase the rate of reproduction is a long-standing endeavor for agricultural researchers. The authors examined the potency of a hyperoxia-luteinizing hormone releasing hormone (LHRH) analog in inducing synchronous estrus in rats. Adult female rats weighing 140-160 g were used to monitor vaginal smear each morning to monitor estrus. In a first set of experiments, 25 [mu] g of the highly active analog of LHRH (D-alanine at position 6 and LHRH’s ethylamide at the 10th position of de-glycine) was placed in a small approximately 25 mm x 3 mm The ball, under ether anesthesia, respectively, to 10 female adult rats per mouse neck subcutaneously implanted a small ball. Ten animals were sham-operated only. Postoperative observation of estrous cycle changes. The second group of experiments, also divided into experimental group and control group, dealing with the same experimental group. On the third, fourth and fifth days after removing the subcutaneously implanted pellet or sham operation (control group), two