Effects of prostaglandin F2.ALPHA. administration on the time of parturition and post-partum ovulation in rats.
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- HASHIZUME Kazuyoshi
- Laboratory of Animal Reproduction, Faculty of Agriculture, Tohoku University Department of Experimental Animals, National Defence Medical College
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- SUGAWARA Shichiro
- Laboratory of Animal Reproduction, Faculty of Agriculture, Tohoku University
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- UMEZU Motoaki
- Laboratory of Animal Reproduction, Faculty of Agriculture, Tohoku University
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- TAKEUCHI Saburo
- Laboratory of Animal Reproduction, Faculty of Agriculture, Tohoku University
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- MASAKI Junji
- Laboratory of Animal Reproduction, Faculty of Agriculture, Tohoku University
Bibliographic Information
- Other Title
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- ラットの分娩および後分娩排卵に及ぼすプロスタグランジンF<SUB>2α</SUB>の影響
- ラットの分娩および後分娩排卵におよぼすプロスタグランジンF2αの影響〔英文〕
- ラット ノ ブンベン オヨビ ゴ ブンベン ハイラン ニ オヨボス プロスタグ
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Abstract
The time relationship between delivery and post-partum ovulation in rats treated with PGF2α was investigated.<BR>PGF2α, 1.0 mg/rat, was s.c. injected at 21:00 on Day 19 (PG 19 group) or 09:00 on Day 20 (PG 20 group) of pregnancy.<BR>In the PGF2α-treated groups, first delivery occurred about 30 h after the treatment. About 90% of the rats delivered within 48 h after the treatment. Some rats which delivered from 11:00 to 19:00 on Day 21 of pregnancy in the PG 19 group had ovulated within 12 h after the delivery. In rats which delivered from 20:00 on Day 21 to 10:00 on Day 22 of pregnancy in the PG 20 group, ovulation was not detected until 23:00 on Day 22 of pregnancy.<BR>Serum gonadotrophin levels (LH and FSH) increased within 2 h after the delivery in the PG 19 group. In the PG 20 group, however, gonadotrophin levels did not change until 12:00 on Day 22 of pregnancy.<BR>These results suggest that the timing of the "critical period" for the release of gonadotrophins for post-partum ovulation in the PGF2α-treated rats is between 11:00 and 20:00. The "critical period" is similar to normally delivering rats and broader than that in cyclic rats.
Journal
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- The Japanese journal of animal reproduction
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The Japanese journal of animal reproduction 27 (2), 106-112, 1981
THE SOCIETY FOR REPRODUCTION AND DEVELOPMENT
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Details 詳細情報について
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- CRID
- 1390001206334335104
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- NII Article ID
- 130004213967
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- NII Book ID
- AN00041843
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- NDL BIB ID
- 2319061
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- ISSN
- 03859932
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed