Tanaka K
Poult Sci. 1976 Mar;55(2):714-6. doi: 10.3382/ps.0550714.
The walls of the preovulatory follicles and the ruptured follicles collected during the middle of a clutch sequence were extracted separately for an oviposition-inducing factor. The activity of this factor in the follicular extracts was estimated by single intravenous injection of the extracts to hens with a soft-shelled egg in the uterus. Administration of the extracts from either follicles destined to ovulate in 20 to 27 hours or follicles in 46 to 53 hours failed to induce premature oviposition of soft-shelled egg in any of the hens treated. In contrast, the largest follicle within 1 hour prior to the expected ovulation exhibited a high activity for inducing premature ovipositions. This level of the activity seemed to be persisted in the subsequent ruptured follicle for several hours, followed by considerable decrease in activity after about one day or more days.
在一窝产卵过程中，分别提取处于排卵前期卵泡的壁以及在产卵序列中期收集的破裂卵泡，以获取排卵诱导因子。通过将卵泡提取物单次静脉注射给子宫内有软壳蛋的母鸡，来评估该因子在卵泡提取物中的活性。对预定在20至27小时排卵的卵泡或46至53小时卵泡的提取物进行给药，在任何接受治疗的母鸡中均未诱导软壳蛋过早排卵。相比之下，在预期排卵前1小时内最大的卵泡表现出较高的诱导过早排卵的活性。这种活性水平似乎在随后破裂的卵泡中持续数小时，然后在大约一天或多天后活性显著下降。
