2024-03-28T13:03:32Z
https://soar-ir.repo.nii.ac.jp/oai
oai:soar-ir.repo.nii.ac.jp:00010594
2023-01-06T02:53:59Z
1016:1018:1019:1038
乳牛の黄体制御による分娩後の受胎早期化
Control of Corpus Luteum Function for Shortening the Conception Interval of Dairy Cows
Yamamoto, S
Tsujii, H
Hashizume, K
polyvinyl pyroidone and iodine
corpus luteum
human chorionic gonadotropin
prostaglandin F2α
The present study was undertaken to evaluate the shortening of conception interval by artificially controlling the function of corpus luteum. A commercial solution of polyvinyl pyrolidone and iodine was infused into the uterine cavity on d 10 postpartum, subsequently using human chorionic gonadotropin, PGF2α, or GnRH to induce estrus 30 to 40 d postpartum. Cows in the control group, showing normal signs of estrus approximately 35 d postpartum were used for artificial insemination without any other artificial treatment. Only 5 of 124 cows showed signs of estrus at 35 d after parturition, but these cows failed to conceive after artificial insemination. The follicular development and subsequent estrus signs were found 1/3, 2/2, 5/5, 3/4 and 2/4 for the treatment of polyvinyl pyroidone and iodine only, hCG+PGF2α, PGF2α, GnRH and PGF2α+GnRH, respectively. Subsequently, 13 of 18 cows showed signs of estrus and ovulation. Pregnancy rates were 50 and 60% for the cows treated with hCG+PGF2α and PGF2α alone, respectively; and the total treated conception cows were 22% within d 33.8 (mean) postpartum. Cows not conceived by d 35 postpartum usually (12 of 14) conceived within d 60 postpartum. The remaining 2 cows had ovarian cysts. Treatment with PGF2α alone or with hCG followed by the injection of PVP+I artificially adjusted the function of corpus luteum, took place ovulation, and occurred conception within d 35 postpartum.
Article
信州大学農学部紀要. 33(1-2): 61-70 (1996)
journal article
信州大学農学部
1996-12-31
application/pdf
信州大学農学部紀要
1-2
33
61
70
0583-0621
AN00121352
https://soar-ir.repo.nii.ac.jp/record/10594/files/v33_07.pdf
eng