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对C57BL／6小鼠超排效果的研究 总被引：1，自引：0，他引：1
本文以近交系C57BL／6小鼠为实验对象．研究注射不同剂量的PMSG和hCG对小鼠超排效果的影响。取C57BL／6小鼠各30只,按照注射剂量不同分为A、B、C三组,每组10只,A组注射PMSG2．5IU,HCG2．5IU,B组注射PMSG5．0IU,HCG5．0IU,C组注射PMSG7．5IU,HCG7．5IU。每只小鼠腹腔注射PMSG,间隔48h后分别注射HCG进行超数排卵,再与性成熟同系公鼠合笼,次日早上检查阴道栓．有栓雌鼠用颈椎脱臼法处死。在实体显微镜下由输卵管膨大部冲卵．收集卵母细胞置于盛有M2培养液的表面皿中检查计数．分析超排效果。结果表明。C57BU6小鼠B组的平均取卵数极显著高于A组的平均取卵数（P〈0．05）;B组的平均取卵数显著高于C组的平均取卵数（P〈0．05）;C组与A组的平均取卵数差异不显著（P〉0．05）。 相似文献
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确定昆明种小白鼠超排的最佳激素剂量和分析其他影响超排的因素。将40只雌性昆明小白鼠随机分为四组。每组注射PMSG和HCG分别为5IU＋5IU、5IU＋10IU、10IU＋5IU和10IU＋10IU,注射间隔时间为48h,比较排出卵母细胞的数量。结果表明,试验3组小鼠排出卵母细胞的平均数量（57．1枚）,显著（P〈0．05）高于试验1组（42．7枚）和试验2组（41．7枚）,极显著（P〈0．01）高于试验4组（30．7枚）。其它三组间无显著差异。左右卵巢的排卵数也未表现出明显差异。初步说明昆明小白鼠超排的最佳激素剂量为10IU PMSG＋5IU HCG,但要想得到很好的超排效果还要考虑其他因素。 相似文献
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不同剂量生殖激素对小鼠超排效果的影响 总被引：1，自引：0，他引：1
为了探讨孕马血清促性腺激素(PMSG)和人绒毛膜促性腺激素(HCG)对小鼠超数排卵的最佳组合剂量、最佳注射时间间隔,本试验以成熟实验小鼠为试验动物,分别采用不同剂量PMSG(5IU、7.5IU、10IU、12.5IU)与不同剂量HCG(5IU、7.5IU、10IU、12.5IU)组合注射小鼠进行排卵效果研究,并以44h、46h、48h、50h的间隔时间对小鼠进行超数排卵处理试验。结果表明,(10+10)IU剂量组合处理的见栓小鼠平均获卵数最高(10.3枚);在注射间隔为48h试验组中见栓小鼠平均获卵数最高(8.4枚)。提示本试验条件下,小鼠超排中PMSG与HCG组合剂量为10IU、注射时间间隔为48h时超排效果较好。 相似文献
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确定昆明种小白鼠超排的最佳激素剂量和分析其他影响超排的因素。将40只雌性昆明小白鼠随机分为四组。每组注射PMSG和HCG分别为5IU+5IU、5IU+10IU、10IU+5IU和10IU+10IU,注射间隔时间为48h,比较排出卵母细胞的数量。结果表明,试验3组小鼠排出卵母细胞的平均数量(57.1枚),显著(P<0.05)高于试验1组(42.7枚)和试验2组(41.7枚),极显著(P<0.01)高于试验4组(30.7枚)。其它三组间无显著差异。左右卵巢的排卵数也未表现出明显差异。初步说明昆明小白鼠超排的最佳激素剂量为10IU PMSG+5IU HCG,但要想得到很好的超排效果还要考虑其他因素。 相似文献
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应用不同激素对山羊进行超排的对比试验 总被引：3，自引：0，他引：3
对绒山羊分别进行FSH和PMSG超排效果试验：A组采用减量注射法肌肉注射FSH,每天2次,连续4天,总计量260IU;B组一次性肌注PMSG 1200IU。母羊发情后注射hCG 500IU和LH 200IU,随即配种,间隔8～10h复配一次。配种7天后,手术法从供试羊子宫角取胚。结果表明：使用FSH和PMSG进行绒山羊超数排卵均有较好的效果。两者相比,FSH处理组排卵整齐,且胚胎合格率高,效果优于PMSG。 相似文献
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以120 IU、144IU、168IU三种剂量FSH（促卵泡素），在供体羊发情的第2d开始超排，126只供体的超排结果如下：共回收卵1112枚，平均8．83枚，其中胚胎可用胚胎986枚，平均7．83枚。剂量为144IU组和168IU组的超排效果都很好，但与20IU组比无显著差异（P〉0．05）。供体羊的年龄对超排效果影响较大，2～5岁经产羊的超排效果显著高于育成羊和老龄羊（P〈0．01）。将986枚胚胎移植给972只受体，有682只妊娠，妊娠率为70．16％。共产羔羊661只，产羔率为68％。受体羊与供体羊同期化程度、胚龄等因素对妊娠率有一定影响，但无显著差异（P〉0．05）。用CIDR（阴道孕酮释放装置）诱导供体母羊同期发情，与自然发情比较，不影响供体超排效果。用PG（氯前列烯醇）诱导受体母羊发情，与自然发情比较，不影响受体羊的妊娠率。供体羊在繁殖季节可以重复超排利用。 相似文献
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连续重复超数排卵冲胚对引进品种肉羊快速扩繁的效果研究 《畜牧与饲料科学》2022,43(2):61-68
[目的] 评价引进品种肉羊的连续重复超数排卵（超排）、冲胚、胚胎移植等繁育技术集成模式的应用效果。[方法] 于2016—2018年,对选取的1 575只澳洲白（n=230）、白头杜泊（n=228）、黑头杜泊（n=541）、白头萨福克（n=200）、黑头萨福克（n=376）5个品种母羊,进行间隔30 d以上的连续同期发情（孕酮海绵栓）与超排（330~450 IU FSH+200~300 IU PMSG+0.1 mg PG）处理;经过腹腔内窥镜输精后进行子宫角冲胚,回收胚胎后计数并评估质量,挑取部分胚胎进行移植;对比分析品种、季节、重复超排次数等对胚胎生产指标的影响。[结果] 共获得18 496枚胚胎,有14 971枚可用胚;胚胎移植后的受胎率为69.8%,产羔率为93.2%;只均总胚数和只均可用胚数2项指标显示,胚胎生产特性以白头萨福克、黑头萨福克、黑头杜泊较好,澳洲白次之,白头杜泊最差;不同品种母羊连续重复超排冲胚后回收的只均总胚数和只均可用胚数持续增长,直到第4或第5次;澳洲白的超排冲胚效果在春季较好,而其他品种在冬季较好。[结论] 连续重复超数排卵、冲胚技术对于扩繁引进肉羊品种群体是可行的,应根据不同品种及其表现出的季节特性科学、适时应用。 相似文献
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Transfer of pig embryos to different uterine sites. 总被引：3，自引：0，他引：3
Embryo transfer in pigs normally involves surgery. In connection with the development of nonsurgical or endoscopic transfer techniques, it is important to know whether the uterine site to which embryos are transferred has an effect on the success rate. In the present investigation, prepubertal donor gilts were treated with 1,500 IU of PMSG and, 72 h later, with 500 IU of hCG. Gilts were artificially inseminated 24 and 36 h after hCG injection. Embryos at the expanded blastocyst stage were collected from donor gilts. Recipient gilts were treated synchronous with the donors, using 1,000 IU of PMSG followed, 72 h later, with 500 IU of hCG. After a maximum of 3 h in vitro, embryos (n = 15 to 20, mean = 17.3) were transferred surgically to the middle of the uterine horn, to the caudal quarter of the uterine horn, or to the uterine body. Recipients were slaughtered between 28 and 34 d after transfer. The pregnancy rate of the recipients was low when the embryos were deposited in the uterine body (12%), compared with the middle (88%) or the caudal quarter of the uterine horn (81%) (P < .01). The corresponding average number of viable fetuses per pregnant recipient was 8.2 in the uterine body, 5.6 in the middle, and 4.5 in the caudal quarter. Average survival rate of embryos after transfer to the middle of the uterine horn was 41% vs 29 and 3% after transfer to the caudal quarter or the uterine body, respectively (P < .01). Hence, the uterine body seems to be an unsuitable site for embryo transfer in pigs. These results may explain the unsatisfactory results achieved with nonsurgical embryo transfer in the past. 相似文献
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The doses of FSH (follicle-stimulating hormone), PMSG (pregnant mare serum gonadotrophin), and gn-RH (gonadotrophin-releasing hormone) effective in terms of triggering ovulation were determined in a mouse ovulation test. Varying doses of the above preparations were subcutaneously injected, 48 hours after overstimulation by injection of 0.5 or 1.0 IU of PMSG. The animals were sacrificed for examination, after another 18-20 hours had passed. Roughly 50 per cent of all animals treated (threshold) in one and the same dosage group (n = 5) had ovulated in response to 0.02-0.1 IU of FSH per animal. The following FSH and PMSG dosages are recommended: 0.02, 0.04, 0.06, 0.08, and 0.1 IU of FSH, 0.6, 1.0, 1.4, 1.8, 2.2, 2.6, 3.0 IU of PMSG. When mouse ovulation tests were used in orientation studies, ovulation was regularly induced by Gn-RH doses per animal between 0.01 and 1.0 micrograms. Dosage spacings or increments should be specified with higher accuracy by further studies. 相似文献
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The synthesis and secretion of trypsin (trypsin model serine protease) inhibitors are regulated in ovarian follicles by gonadotropins. The superovulation stimulations with 400 IU FSH, 1000 IU PMSG, 1000 IU HCG, 750 IIU PMSG + 750 IU HCG influence in a different way the trypsin inhibiting activities (TIA) of blood plasma (BP) (Figs 1 and 2) and follicular fluid (fig. 3); this points to a possibility of local effects. An increase in the average values of TIA in BP was statistically significant during the whole experiment: P less than 0.05 to P less than 0.001 (following the administration of PMSG+HCG, or PMSG, and HCG); Antisergon administered in 68 hours after PMSG reduced this increase. The changes in the fraction of low-molecular TIA in BP (after BP treatment with perchloric acid) were of converse nature; a decrease in the average values ranged from P less than 0.02 to P less than 0.001 (following PMSG or other stimulations). Antisergon did not influence this decrease. The changes observed on particular days of the trial (Figs. 1 and 2) also indicate different effects of the preparations, mainly of the component LH, which resulted in the occurrence of large nonovulating follicles (greater than 10 mm--"cystic" ones). No such follicles were observed in nonstimulated ewes and after FSH stimulation. The administration of antisergon (goat's antiserum against PMSG) 68 hours after PMSG administration did not prevent their creation. The TIA of follicular fluid (FF) of antral follicles was on average tenfold in comparison with that of blood plasma; and the TIA FF of follicles greater than 10 mm was higher (up to P less than 0.001) than the TIA FF of follicles less than 10 mm. The administration of Antisergon in shorter intervals following PMSG administration (12, 24, 48 and 58 hours) influenced the average values of TIA BP in 120 hours (since PMSG administration) in dependence on time (Tab. I). The effects of Antisergon administered in 12 and 24 hours after PMSG administration on the TIA BP were insignificant if it was administered in 48 and 58 hours the TIA BP increased (P less than 0.02; P less than 0.001) in comparison with the interval of 12 hours. The TIA FF of follicles less than 5 mm, 5-10 mm and greater than 10 mm varied in dependence on the time intervals of Antisergon administration (Fig. 4). The statistical significance of these changes in shown in Tab. II.(ABSTRACT TRUNCATED AT 400 WORDS) 相似文献
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O Doi H Kusunoki T Sato S Kawakami T Fukuoka K Okuda O Ito E Saito T Hayashi T Hase M Kamiyosh 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2001,63(12):1361-1364
In 3 adult female cheetahs, induced-superovulation treatment was conducted, by means of 200 IU of pregnant mare serum gonadotropin (PMSG) and 100 IU of human chorionic gonadotropin (hCG) 80 hr after PMSG. The administration of PMSG created a sharp increase in the estradiol-17beta concentration, resulting in 232 pg/ml 8 hr later in one specimen out of three. The hCG administration showed an increase in the progesterone concentration of 2.29 ng/ml 46 hr later. In addition, after direct observation of the ovary surface by laparoscopy, 5 follicles in the right ovary over 2 mm in diameter, and 7 corpora lutea (5 in the right ovary and 2 in the left) were found. It is assumed that ovulation can be induced with hCG after 80 hr on PMSG during a cheetah's diestrus or proestrus. 相似文献
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Fujino Y Nakamura Y Kobayashi H Kikuchi K 《The Journal of reproduction and development》2006,52(2):267-275
We examined the relationship between the time elapsed after human chorionic gonadotropin (hCG) administration and developmental stage of porcine embryos after collection. Prepubertal gilts, 7 to 8 months old, were given 1500 IU equine chorionic gonadotropin (eCG) intramuscularly, followed by 500 IU hCG 72 h later. The treated gilts were inseminated artificially on Day 1 (Day 0=the day of hCG administration) and on Day 2. Embryos were collected surgically on Day 6 (140, 144, and 147 h after hCG administration) or on Day 7 (164, 168, and 171 h), and the developmental stages of the collected embryos were examined. From 75.2% (276/367) of the prepubertal gilts treated with hormones, we collected an average of 20.7 embryos per gilt with normal morphology. At 140 h after hCG administration, morulae (54.4%) could be collected. At 144 h, morulae and early blastocysts (57.7% and 28.9%, respectively) were collected. By 147 h, the proportion of embryos at the blastocyst to expanded blastocyst stages had increased (10.0%). From 164 h to 171 h, expanding or expanded blastocysts of more than 200 microm in diameter and hatched blastocysts could be collected. The proportion of hatched blastocysts increased from 3.2% (164 h) to 41.0% (171 h). These results suggests that although the number of ovulations differed among gilts, porcine embryos at the appropriate stages can be collected efficiently by controlling the time elapsed between hCG administration and embryo collection. 相似文献