Studies on the Mechanism of Ovulation in the Fowl
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概要
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To clarify the effect of LH on the mechanism of ovulation in the fowl, a series of the following experiments were performed by the method of ovulation in vitro.1) In the excised follicles removed 2-3 hours before the time of the expected ovulation, whether they could ovulate in vitro without any addition of HCG or not was determined. From the result of this experiment, it was recognized that the follicle scarcely ovulated. So, it was presumed that in 2-3 hours before the time of the expected ovulation the effect of the endogenous LH to induce ovulation was not sufficient.2) Various experiments of HCG addition on the follicle removed 2-3 hours before the time of the expected ovulation in which the effect of endogenous LH was unsatisfactory were performed. In all experiments, most of follicles did not ovulate, and it indicated that HCG, by itself, had no effect to ovulate the follicle.3) Then the follicles removed 2-3 hours before the time of the expected ovulation were poured with the blood plasma containing HCG in several experiments. According to these experiments, most of follicles were ovulated. And it was found that the poured fluid was effective and especially the blood plasma 10 ml + HCG 500 u. was quite effective.From these results, we concluded that HCG became active when it was mixed or cooperated with blood plasma.4) Not only the first follicle (the largest one) but the second and the third follicle were poured with the blood plasma mixed with HCG to determine whether ovulation in vitro might occur or not. From the result of this experiment, it was concluded that ovulation could occur in the follicle removed more than 24 hours before the time of the expected ovulation.5) The large sized follicles (which were smaller than the normal largest follicle) excised 70-120 hours following PMS injection were treated with the blood plasma mixed with HCG in the same manner as the ones mentioned above. According to this result, ovulation could be induced not only in the first follicle but in the second ones.6) The high temperature had no effect on ovulation.
- 鹿児島大学の論文
- 1969-03-25
著者
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OGAWA Kiyohiko
Laboratory of Animal Reproduction
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Nishiyama Hisayoshi
Laboratory Of Animal Reproduction
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