排序方式: 共有21条查询结果,搜索用时 40 毫秒
1.
高本底放射性饮水对小鼠微核和精子的影响 总被引:1,自引:0,他引:1
随机将126只昆明种小白鼠分成3组,分别喂养自来水(对照组)和2种高本底放射性饮水(处理组),在喂养至第50,100,150天时按常规方法采集动物标本进行微核和精子畸形试验。结果显示:两处理组与对照组不同时相点的实验结果基本一致,提示实验浓度的高本底放射性饮水未观察到遗传毒性效应。 相似文献
2.
Crha I Zakova J Huser M Ventruba P Lousova E Pohanka M 《Journal of assisted reproduction and genetics》2011,28(8):725-729
Purpose
The aim of this study was to use digital holographic microscopy (DHM) in human sperm imaging and compare quantitative phase contrast of sperm heads in normozoospermia (NZ) and oligoasthenozoospermia (OAT). 相似文献3.
4.
高放射性矿泉水对小鼠微核和精子的影响 总被引:4,自引:0,他引:4
选用放射性水平不同的矿泉水喂养实验动物,分别在第50d,100d,150d时采集相应标本进行微核和精子畸形实验。结果显示,选用高放射性矿泉水组动物的微核率,精子数量和精子活动率在有些时期同对照组比较表现出显著差异(P〈0.05),提示当矿泉水中的放射性比活度超过一定剂量时可能会对小鼠产生一定的遗传毒性效应。 相似文献
5.
6.
7.
8.
A. De Vos M. Abraham N. Franceus P. Haentjens H. Tournaye G. Verheyen H. Van de Velde 《Journal of assisted reproduction and genetics》2015,32(6):865-871
Purpose
To evaluate whether the deposition of the spermatozoon in the human oocyte at ICSI has any effect on oocyte survival, fertilization, blastocyst development and quality.Methods
In a prospective study, including 78 ICSI cycles, sibling oocytes were injected with “no intention” (group A, standard ICSI, n = 393) or “intention” to deposit the spermatozoon under the cortex (group B, n = 354). Outcome parameters were oocyte survival and fertilization, as well as blastocyst formation and quality.Results
Depositing the sperm under the cortex of the oocyte was not always successful for its final position, therefore, group B was divided into three subgroups: B1 successful deposition (119 oocytes, 33.6 % of oocytes in group B); B2 initially successful but spermatozoon spontaneously relocated after 2 min (136 oocytes, 38.4 %); and B3 unsuccessful deposition (99 oocytes, 28.0 %). Group A and B were compared on an intention-to-treat basis. Additionally, A, B1, B2 and B3 were also compared. The oocyte survival and fertilization, blastocyst and top-quality blastocyst developmental rates were not significantly different.Conclusions
The procedure of depositing the spermatozoon intentionally under the oocyte cortex demanded high technical skills. Successful positioning was only obtained in 34 % of the attempts. We obtained no evidence of improved oocyte survival and fertilization, blastocyst formation and quality when the spermatozoon was permanently positioned under the oocyte cortex. Taken together, depositing the spermatozoon under the oocyte cortex is not recommended for routine ICSI application. 相似文献9.
男性不育者精浆及精子乳酸脱氢酶活性的研究 总被引:1,自引:0,他引:1
目的探讨男性不育症患者精浆及精子中乳酸脱氢酶同工酶X(LDH-X)活性,分析乳酸脱氢酶同工酶活性与男性不育的关系。方法采用聚丙烯酰胺凝胶电泳、全谱酶联染色等方法检测精浆及精子中的LDH-X活性并计算其比值;按照WHO人类精液实验室手册要求对精液进行常规分析。结果 124例不育组精浆LDH-X活性(827.3±46.8)U/L与60例生育组LDH-X活性(616.1±22.4)U/L比较,差异有统计学意义(P〈0.01),不育组精子LDH-X的活性(8.45±3.62)mU/106小于生育组(16.1±10.6)mU/106,差异有统计学意义(P〈0.01)。两组的精浆及精子中LDH-X的比值比较,差异有统计学意义(P〈0.01)。两组的精液密度、精子活动率及精子活力无统计学差异。结论精浆及精子LDH-X活性检测能够反应精子的质量、生育功能以及对受精过程的预期,对选择辅助生育的方法有指导意义。 相似文献
10.
雷公藤多甙(GTW)抗雄性生育活性的研究 总被引:15,自引:0,他引:15
张彬 《中国现代医学杂志》2002,12(4):16-17,20
目的 :研究雷公藤多甙 (GTW )的抗雄性生育活性机制。方法 :给Wistar雄性大鼠灌服GTW 8周后 ,观察其睾丸、附睾形态及一氧化氮合成酶活性的变化。结果 :睾丸内的精子细胞及精子减少、曲细精腔缘出现病理形态的细胞及多核巨细胞。附管内可见精子断头及脱落细胞 ,睾丸间质细胞一氧化氮合成酶平均密度下降。结论 :雷公藤多甙的雄性抗生育作用对精子细胞及睾丸间质细胞等有影响。 相似文献