• 농업과학연구
• /
• 제4권1호
• /
• pp.84-87
• /
• 1977

PMS와 HCG로 과배란유기(過排卵誘起)한 Mouse 배란수(排卵數)의 좌우난소(左右卵巢)의 관계를 비교하였다. 그 결과 배란수(排卵數) 1197개중(個中) 좌난소(左卵巢)에서 603, 우난소(右卵巢)에서 594개(個)의 배란(排卵)이 되고 있어서 동물전체(動物全體)로 보면 반반으로 되어 있다. 개체별(個體別)로 보면 좌우(左右)의 배란수(排卵數)가 많은 24예(例) 우측(右側)의 배란수(排卵數)가 많은 것은 23예(例) 좌우동수(左右同數)의 것은 3예(例)이었다. 또 좌우(左右) 배란수간(排卵數間)에는 뚜렷한 정(正)의 상관(相關)(ri=0.504, p<0.001)이 존재(存在)하였다. 본연구(本硏究)에 사용(使用)한 Mouse의 과배란성적(過排卵成績)은 저자(著者)와 석도(石島)가 1974년(年)1월(月)~4월(月)에 동경농업대학(東京農業大學) 가축번식연구실에서 공동(共同) 실험(實驗)한 것이다. 여기에 부기(附記)하여 관계 각위(各位)에 감사한다.

• Archives of Pharmacal Research
• /
• 제25권2호
• /
• pp.178-183
• /
• 2002

A high molecular ar weight water-soluble chitosan (WSC) with an average molecular weight of 300 kD and a deacethylation level of over 90% was produced using a simple multi-step-membrane separation process. It is known that WSC prevents obesity induced by a high-fat diet. Consequently, this study investigated whether or not WSC improved the ovarian dysfunction caused by obesity in mice. The mice were fed a high density protein and lipid diet for weeks, followed by the administration of WSC at 480 mg/kg body weight per day for 4 days. Thereafter, the changes in body weight, ovulation rate, in vivo and in vitro fertilization and emboryonic development were measured . WSC markedly reduced the body weight of obese mice fed with a high-fat diet, but not in mice fed with a normal diet. WSC had siginificant effects on the ovulation rate, both the in vivo and in vitro fertilization rates and embryonic development. These results indicate an improvement in the ovarian and oviduct dysfunction caused by obesity, and suggest an adjustment in the internal secretions and metabolic functions.

• 대한생식의학회:학술대회논문집
• /
• 대한생식의학회 2007년도 제53차 추계학술대회 초록집
• /
• pp.120.2-121
• /
• 2007

• 한국가축번식학회지
• /
• 제8권1호
• /
• pp.36-45
• /
• 1984

This study was carried out to investigate the changes in ovary in repeatedly superovulated rabbits. A total of 57 New Zealand White and Californian, 25 mature virgin and 32 immature does were used in this study. For induction of repeated superovulation, PMSG and HCG were injected at 17-day and 30-day intervals for mature does and 17-day intervals for immature ones. The repeatedly superovulated does at 17-day intervals were induced luteolysis of pseudopregnant corpus luteum with PGF2${\alpha}$ on Day 8 to 9 p.c. The effect of repeated superovulation on reproductive organs was investigated on Day 3 p.c. in mature does and on Day 3 and 6 p.c. in immature ones, respectively. 1. In mature virgin does, the number of ovulation points in the 2nd and 3rd superovulation period averaged 7.0 and 5.0 at 17-day intervals and 13.4 and 6.0 at 30-day intervals, respectively. These numbers were statistically similar to 9.5 ovulation points in the control. However, there were less (p<0.05) ovulation points in those periods compared with 22.1 ovulation points in the 1st superovulation period. 2. In immature does, the number of ovulation points in the 2nd and 3rd superovulation period averaged 5.3 and 2.3, respectively. These numbers were significantly (p<0.05) decreased than 17.1 ovulation points in the 1st periods. The number of ovulation points in the 2nd superovulation period was similar to that in the control, but there was a significant (p<0.05) decrease in the number of ovulation points in the 3rd period as compared to the control. 3. In mature virgin does, the number of visible normal and hemorrhagic follicles (>1.0mm diameter) on day 3 p.c. averaged 19.1 and 8.9 in the 1st superovulation period, respectively. In the 2nd 3rd superovulation period, the number of normal follicles averaged 8.3 and 15.5 at 17-day intervals and 17.8 and 14.5 at 30-day intervals. The number of hemorrhagic follicles in the 2nd and 3rd superovulation period averaged 6.3 and 2.0 at 17-day intervals and 5.2 and 7.8 at 30-day intervals, respectively. There was a slight decrease, although not significant, in the number of normal and hemorrhagic follicles in the 2nd and 3rd period at 17-day intervals compared to that in the 1st period. 4. In immature does, the number of visible normal follicles on day 3 and day 6 p.c. in the 1st superovulation period averaged 27:3 and 26.1, respectively. The follicles on day 3 p.c. tended to increase slightly more than that in the cortrol, but the average number of normal follicles on day 6 p.c. did not differ from that in the control. The number of visible hemorrhagic follicles on day 3 and day 6 p.c. in the 1st of follicles in the 1st superovulation period average 10.2 and 9.9, respectively. There was a slight increase in the number of follicles in the 1st period compared to that in the control. In the 2nd and 3rd superovulation period, the number of normal follicles revealed a slight decrease in the 3rd period, but the number of hemorrhagic follicles was not different between periods. 5. The number of growing follicles with incipient intral formation on day 3 p.c. in mature does of the 1st superovulaton period average 29.7 and the average number of growing follicles in the 3rd period was 26.7 at 17-day intervals and 31.0 at 30-day intervals, respectively. These numbers did not differ from that in the control. In immature does, the number of growing follicles averaged 57.7, 45.0 and 59.3 in the 1st, 2nd and 3rd superovulation period, respectively. There was a slight but not significant decrease in the number of growing follicles in the 3rd period compared to that in the control.

• 한국가축번식학회지
• /
• 제11권3호
• /
• pp.170-180
• /
• 1987

This study was undertaken to determine the effects of HCG and trout pitutary on sexual maturation and ovulation in the Korean loach, Misgurnus anguillicaudatus. Sexual maturation was observed in the fish treated with 250＋125 IU HCG within 2-4 days following injections. Total ovary weight and GSI were significantly greater in the hormone-treated fish than in the control fish. Furthermore, in the hormone-treated fish body weight increased by about 4-9 percent in 2 days. The water content of the ovulated eggs of the fish treated with 250＋125 IU HCG was also greater than that in the control. Changes in both macroscopic & microscopic appearnce of Korean loach ovaries are describled, as well as changes in the gonadosomatic index. Oocytes pass through seven cytologically changes in the relative stages. By examining these stages, it was found that oogenesis occures in two broad phases. The previtellogenic phasebegins as a new oogonia continues to arise following spawning. These rapidly develop into early perinucleolus oocytes, which in turn develop into resting stage oocytes. Most oocytes remain in this stage when they develop into late perinucleolus oocytes. The vitellogenic phase begins as these late perinucleolus oocytes become transformed into early maturing oocytes through the accumulation of yolk. The cytoplasm completely fills with yolk as oocytes reach the late maturing stage. Shortly before spawning the final hyaline stage of developing is reached. Changes in the microscopic appearances of the ovaries were well correlated with changes in both gonadosomatic index and macroscopic appearance.

• Asian-Australasian Journal of Animal Sciences
• /
• 제13권7호
• /
• pp.897-900
• /
• 2000

The experiment was conducted to study the effect of GnRH administration at induced estrus on pituitary and ovarian response in buffalo heifers. Eight Murrah river buffaloes of 12 to 13 months of age were treated with $PGF_{{2}{\alpha}}$ and eCG combination. GnRH (Fertagyl) 200 ug was injected (iv) at estrus in four heifers (treated group) while saline (2 ml, iv) was injected in remaining four heifers (control group). Blood was collected through jugular catheter to estimate plasma FSH, LH and estradiol level. The pretreatment plasma FSH, LH and estradiol values ranged from $8.46{\pm}1.97ng/ml$ to $12.31{\pm}1.30ng/ml$, $0.87{\pm}0.21ng/ml$ to $1.19{\pm}0.29ng/ml$ and $19.09{\pm}2.38pg/ml$ to $20.24{\pm}1.00pg/ml$ respectively. The plasma estradiol concentration elevated significantly (p<0.05) within 24 hr after eCG administration and reached its peak levels of $154.09{\pm}17.28pg/ml$ and $181.95{\pm}31.82pg/ml$ at estrus in respectively treatment and control groups. The plasma FSH and LH concentrations did not increase during follicular development after eCG administration while initial significant (p<0.05) increases in both plasma FSH and LH concentrations occured within 5 and 10 min, reaching peak levels of respectively $110.06{\pm}23.56ng/ml$ and $13.15{\pm}3.13ng/ml$ within 90 min after GnRH injection was detected. A sharp and significant decline in plasma estradiol concentration ($59.27{\pm}8.78pg/ml$) associated with synchronized ovulation within 24 hours after GnRH injection was recorded. The observation suggest that the hypophysis of prepubertal buffaloes treated with eCG have gonadotrophins awaiting the releasing factor to evoke release of gonadotrophin during the follicular phase to induce synchronized ovulation.

• 한국가축번식학회지
• /
• 제27권3호
• /
• pp.207-213
• /
• 2003

본 연구는 한우에 PGF$_2$$\alpha$와 GnRH+PGF$_2$$\alpha$+GnRH(Ov-synch)를 처리하여 발정 및 배란을 동기화 시켰으며, 2차 GnRH 투여후 배란시간, 2차 GnRH 투여후 시간 경과에 따른 수태율과 발정ㆍ배란 동기화법에 의한 수태율을 조사하고자 실시하였다. 시험축은 총 4개 농가에서 경산우 150두를 무작위로 선발하여 시험에 공시하였으며, 발정ㆍ배란동기화 방법에 따라 발정을 유기한 후 1회 인공수정을 실시하고 수태율에 미치는 영향을 조사하였다. 호르몬처리 방법으로는 GnRH+PCF$_2$$\alpha$+GnRH(Ov-synch)와 PGF$_2$$\alpha$를 이용한 발정동기화 방법을 사용하였다. 2차 GnRH 투여 후 배란시간을 알아보기 GnRH 투여 후 24시간 후부터 32시간까지 2시간 간격으로 초음파 Sonovet-600(Medison. Korea)를 이용하여 난소를 촬영하였다. 1. 호르몬 투여후 발정동기 화율은 PGF$_2$$\alpha$ 투여구에서 40.0%와 GnRH+PGF$_2$$\alpha$+GnRH(Ov-synch)처리구에서 91.3%로 나타났다. 2. 2차 GnRH 주사후 24시간에 배란이 시작되어 32시간에 배란이 종료되었으며, 배란율은 28시간째에 46.6%가 배란되어 가장 높게 나타났다. 3. 2차 GnRH주사후 6∼24시간에 수정한 군이 6시간 이전과 30시간 이후에 수정시킨 군에 비해 높은 수태율을 나타냈다. 4. 호르몬 처리별 수태율은 PGF$_2$$\alpha$, CIDR 및 GnRH+PGF$_2$$\alpha$+GnRH(Ov-synch)에서 각각 50.0, 36.0와 76.9%로 GnRH+PGF$_2$$\alpha$+CnRH(Ov-synch)군에서 가장 높은 수태율을 나타냈다.

• Clinical and Experimental Reproductive Medicine
• /
• 제14권1호
• /
• pp.19-28
• /
• 1987

35 patients of normal reproductive age group (22-37 yrs) were selected for ovulation induction using $Clomid^{(R)}$ and HMG. Correlation between canalization of cervical mucus and estradiol level in plasma. morphological ovarian follicular change by ultrasonogram, Ferning and Spinnbarkeit were studied in the induced ovulatory menstrual cycles. By retrospective analysis, the results were following; 1. Canalization appeared on the eighth day of the menstrual cycle in $Clomid^{(R)}$ group, and seventh day of HMG group. And the number of the channels increased gradually until the ovulation time. 2. The mean number of channels increased from 12${\pm}$12 in $Clomid^{(R)}$ group, 19${\pm}$14 in HMG group (Day-6) to a maximum of 46${\pm}$22 in $Clomid^{(R)}$ group (Day-1). 3. The maximum plasma estradiol(E2) level was 812${\pm}$722pg/ml in $Clomid^{(R)}$ group (Day-1), 1792${\pm}$504 pg/ml in HMG group (Day-1), and there was a good statistical correlation between the number of channels and the plasma E2 level. 4. The maximal follicular diameter was 19.4${\pm}$6.7 mm in $Clomid^{(R)}$ Group (Day-1) 19.3${\pm}$4.6mm in HMG group (Day-1) and after than decreased. There was a good statistical correlation between the number of channels and the follicular diameter. 5. When grade of ferning was I, the number of channels were 19.4${\pm}$6.7 in $Clomid^{(R)}$ group, 38${\pm}$26 in HMG group. When grade of ferning was III, the number of channels were 54${\pm}$30 in $Clomid^{(R)}$ group, 71${\pm}$36 in HMG group. 6. The maximum score of Spinnbarkeit was 2.6${\pm}$0.5 in Clomid group (Day-0), 2.6${\pm}$0.5 in HMG group (Day-2). In conclusion, the phenomenon of cervical mucus canalization showed the value of the clinical use as an ovulatin marker.

• Journal of Preventive Medicine and Public Health
• /
• 제17권1호
• /
• pp.245-250
• /
• 1984

Reciprocal exchanges of DNA in sister chromatids (SCEs) are induced by various carcinogens and mutagens, although the quantitative relationship between the number of mutations and SCEs induced varies among chemicals. Nevertheless, the analysis of SCEs production by various agents often proposed as a sensitive and quantitative assay for mutagenicity and cytotoxicity. Mercury, even if which has no evidences for mutagenicity and carcinogenicity, is reported to exert some cytotoxic effects, such as chromosomal aberrations or bad influences to ovulation and reproduction in experimental animals, etc.. In this study, tests for sister chromatid exchanges have been carried out on normal human lymphocytes in whole blood culture to add mercury chloride ($HgCl_2$) or methylmercury chloride ($CH_3\;HgCl$) for 72 hr. The results indicate the dose-dependent relationship between the frequencies of SCEs and the concentrations of $HgCl_2,\;CH_{3}HgCl$ and 5-bromo-2'-deoxyuridine (BrdU). Lymphocyte proliferation has depressed in the higher concentration of mercury.

• 한국가축번식학회지
• /
• 제7권1호
• /
• pp.19-23
• /
• 1983

Present studies were conducted to investigate the developmental stage and the location of embryos in the reproductive tract at various times after ovulation, the morphologically normal after thawing of embryos preserved in liquid nitrogen, and the survival after transferring frozen-thawed embryos. The results obtained were as follows: 1. Embryo stage and location in the reproductive tract after hCG administration. For the investigation of embryo stage and location in the reproductive tract after ovulation, rabbits were laparotomized at 24, 40, 48, 72 and 120 hrs post hCG injection, simultaneously with mating. the oviducts and uteri were flushed out with PBS medium containing 50% rabbit serum, respectively. 1) Most of embryos was remained in the oviduct within 48 hrs, with the lapse of time, embryos were started to move to uterus and shifted in uterus at 72 hrs after hCG injection. 2) The representatives of embryos stage collected at 24, 40, 48, 72 and 120 hrs were 1-cell(60.4%), 8-cell to early morula (52.3, 39.3%), late blastocyst (95.5%) stages, respectively. 2. Morphological normality and survival of the frozen-thawed embryos. For the evalution of the quality and viability on the frozen-thawed embryos, immediately after thawing, embryos were assessed by morphologically normal under a dissecting microscope, and a further test of frozen-thawed embryos was made by transferring the morphologically normal embryos to the uteri of recipient rabbit induced pseudopregnancy by the injection of hCG at the time of hCG injection in donor rabbits. 1) The propotions of embryos which a, pp.ared morphologically normal was higher when 8-cell (85.7%) and morula(90.5%) were used for freezing than when 4-cell (66.7%) and blastocyst (75.8%) were used. 2) Preganacies were observed at Day 15 after transfer of frozen-thawed 8-cell (7/13), morula (19/42) and blastocyst (3/19) but not after transfer of embryos at 4-cell stage.