• 대한생식의학회:학술대회논문집
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• 2004.06a
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• pp.69.1-69.1
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• 2004

• Proceedings of the Korean Society of Developmental Biology Conference
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• 2004.07a
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• pp.29-29
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• 2004

• Proceedings of the Korean Society of Embryo Transfer Conference
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• 1999.10a
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• pp.11-17
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• 1999

• 종축개량
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• v.14 no.2
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• pp.46-53
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• 1992

본 강연의 취지는 고능력우의 번식관리에 대해 다시 한번 뒤돌아보고 고능력우군에서 흔히 찾아볼 수 있는 평범한 문제점들을 낙농가에게 알리는데 있다. 본 강연의 내용은 기록, 발정주기, 발정 발견의 기술, 수정, 수정관리, 그리고 번식장애를 포함한 여러분야에 대한 일반적인 관찰이다. 가장 중요한 것으로 많은 불임의 문제점들을 해결하는 단서로서의 적절한 발정의 발견까지 포함한다. 발정의 조기 발견과 12달 내지 13달의 이상적인 분만간격으로 이끄는 시기 적절한 수정을 통하여 가장 좋은 수익을 올리는데 그 목적이 있다. 여기서는 영양, 유전, 인공수정 기술 혹은 수정란 이식을 자세하게 언급하지 않았지만, 앞에서 말한 모든 것들이 이해되고 실천되도록 하기 위한 번식기능에 대해 기본적으로 이해시키고자 한다.

• Korean Journal of Animal Reproduction
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• v.19 no.2
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• pp.147-152
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• 1995

The purpose of this study was to examine the estrus synchronization and superovulation of pigs with hormone treatments. Three different kinds of procedures for synchronization and superovulation were used as follow: I) gilts in natural estrus behavior (control): 2) gilts synchronized with 20mg altrenogest for 9 days regardless of the estrus cycle; 3) gilts received PG600 (400IU PMSG + 200 IU hCG) in 15 day of the estrus cycle; and then gilts administrated with PMSG (1,500 IU) and hCG (750 IU) after altrenogest and PG600 treatment for superovulation. Estrus was checked daily with a boar, in estrus synchronization, the intervals from hormone treatment to estrus were different between PG600 (43/47) and altrenogest (13/53) within 6 days. The percentage of animals displaying a estrus response were not different by hormone treatments. The average number of corpora lutea (C.L) and ovulated embryos were similar between PG600 25.4${\pm}$13.1, 19.0$\pm$12.8 and altrenogest 25.5${\pm}$0.7, 15.0${\pm}$4.2, respectively, but was increased (P<0.05) by hormone treatment compared to that 12.9${\pm}$1.8, 12.7${\pm}$3.9 in the control. The number of normal embryos after ovulation was higher in the control than hormone treatment. Therefore, these results suggest that altrenogest and PG600 treatment could be a valuable for cut down the labour and cost by synchronization.

• The Korean Journal of Zoology
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• v.23 no.2
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• pp.61-68
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• 1980

Quantitative analysis of the activities of transport ATPases as well as alkaline phosphatase of the mouse uterus was carried out during the estrous cycle. Even though the proportional patterns of the enzyme activities were similar each another between the stages of estrous cycle, the absolute activities of the enzymes except $K^+$-dependent and $Na^+$, $K^+$-activated ATPases at the time of estrus were significantly (p<0.025) higher than that at any other time of the estrous cycle. That is, the activities of $K^+$-dependent and $Na^+$, $K^+$-activated ATPases were negligible during the period of time from diestrus to estrus while the little activities (0.04 $\\sim$ 0.05$\\mu$M/mg protein/hr in average, $6\\sim7$% of the total enzyme activity) of these enzymes appeared at the time of metaestrus. On the other hand, at the time of estrus, the activities of $Mg^++$-dependent phosphatase, transport ATPase and alkaline phosphatase were rapidly and tremendously increased to be 0.69 (35%), 0.42 (21%) and 1.58 (79%), respectively. The activity of alkaline phosphatase was in the range of 0.60 $\\sim$ 1.58 (79 $\\sim$ 90%) and predominant throughout the estrous cycle. The activity of $Mg^++$-dependent alkaline phosphatase was estimated as 12 $\\sim$ 16% of the total enzyme activity. Therefore, it is assumed likely that $K^+$-dependent and $Na^+$, $K^+$-activated ATPases are not the main factors to control the fluid accumulation at the time of estrus, but may be the factors to reabsorb the luminal fluid into the uterine epithelium at the time of metaestrus, and that $Mg^++$-dependent phosphatase, transport ATPase and alkaline phosphatase must be closely involved in the secretion of luminal fluid from the epithelial cells of the mouse uterus.

• Korean Journal of Agricultural Science
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• v.11 no.2
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• pp.233-243
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• 1984

The present study was carried out to determine the changes of the sex hormone levels in serum throughout the estrous cycle and the gestation period on the Landrace gilts. The blood samples were taken from the vein of six gilts. LH, FSH, prolactin, progesterone, $estradiol-17{\beta}$ and cortisol in serum were analyzed by the radioimmunoassay methods. The results obtained on this study were summarized as follows; 1. The age at puberal estrus was 179.5 days, the weight at puberal estrus was 88.2kg, the length of estrous cycle was 21.3days, the gestation length was 114days and the litter size was 9.5 head in the Landrace gilts. 2. During the estrous cycle, the serum LH and prolactin concentrations were below 1.56mIU/ml and 2.4ng/ml, respectively, under the limit of detection of the assay. The FSH concentrations ranged from 1.50 to 2.20mIU/ml for day 6~15 after the estrus and they were below 1.25mIU/ml from day 3 to day + 3, with day 0 being the first day of the estrus. 3. Progesterone concentrations were 1.90ng/ml at day 0 of the estrus and increased about 13.1ng/ml at day 3 of the estrus, and reached peak levels at day 9. $Estradiol-17{\beta}$ concentrations were below 27.2pg/ml throughout the luteal phase, and reached about 27.2pg/ml at day 0 and day 18. Cortisol concentrations reached peak levels at dey 0 and ranged from 24.65 to 28.57ng/ml throughout the luteal phase. 4. During the gestation period, the concentrations of LH, FSH and prolactin ranged of 3.10~4.37mIU/ml, 1.30~1.80mIU/ml and 2.60~6.70ng/ml, respectively. 5. Progesterone concentrations declined from 38.90~16.85ng/ml throughout the pregnancy to 1.90ng/ml at the time of parturition. $Estradiol-17{\beta}$ concentrations increased from 27.20pg/ml at 15 days after the pregnancy to 620.17pg/ml at the time of parturition. Cortisol concentrations reached peak levels at the time of parturition and ranged from 13.58 to 22.31ng/ml throughout the pregnancy.

• Proceedings of the Korean Society of Developmental Biology Conference
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• 2005.10a
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• pp.47-48
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• 2005

• Proceedings of the Korean Society of Embryo Transfer Conference
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• 2005.10a
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• pp.47-48
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• 2005

• Proceedings of the Korean Society of Embryo Transfer Conference
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• 2004.10a
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• pp.47-48
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• 2004