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排序方式: 共有435条查询结果,搜索用时 15 毫秒
61.
Magnetization transfer contrast: MR imaging of the knee 总被引:1,自引:0,他引:1
62.
63.
64.
Renal localization of gallium-67 citrate 总被引:1,自引:0,他引:1
65.
Effect of parental age on fertilization and pregnancy characteristics in couples treated by intracytoplasmic sperm injection 总被引:11,自引:5,他引:6
Spandorfer SD; Avrech OM; Colombero LT; Palermo GD; Rosenwaks Z 《Human reproduction (Oxford, England)》1998,13(2):334-338
The purpose of this study was to investigate any influence of maternal
and/or paternal age on gamete characteristics and pregnancy outcomes in
intracytoplasmic sperm injection (ICSI) cycles. In all, 821 consecutive
ICSI cases were analysed retrospectively. While a significant linear
decline in semen volume was detected, no significant differences in the
concentration, motility or morphology of the spermatozoa were found with
paternal ageing. A significant decline in the number of oocytes retrieved
and the number of mature oocytes obtained was found with advancing maternal
age. An increase in the occurrence of digyny was noted with parental
ageing, while no difference in single or bipronuclear fertilization was
found. Older women had a decreased incidence of single pronucleus formation
and an increase in digyny, but no significant difference in the percentage
of oocytes that underwent two-pronuclear fertilization was detected with
regard to maternal ageing. Pregnancy outcomes were not influenced by the
age of the male partner, while a strong negative correlation was found with
maternal ageing. To better analyse male partner ageing as a factor
affecting pregnancy outcome, we analysed a subgroup of patients with a
female partner aged <35 years who underwent ICSI. No paternal influence
on ICSI pregnancy outcome was found in this subgroup of patients. We
conclude that the influence on pregnancy outcome after ICSI is related
mostly to maternal and not paternal age.
相似文献
66.
67.
Bone sarcomas in Paget disease: a study of 85 patients 总被引:5,自引:0,他引:5
This is a comprehensive review of 85 patients who had bone sarcoma associated with Paget disease and who were seen at Memorial Sloan-Kettering Cancer Center between 1927 and 1982. There was an almost equal distribution of tumors in the axial and the appendicular skeletons. The pelvis, humerus, femur, and skull were the tumor sites in 80% of cases. The tumors were bulky large soft tissue masses. Lytic lesions were more common than sclerotic lesions. Mixed lytic and sclerotic lesions were much less common than either single type. Periosteal reaction was uncommon and found in less than 7%. Methylene diphosphonate scans of the bone often showed a cold area that was associated with marked increase in uptake on the gallium scan. Angiography, which was performed in 13 patients, was useful, but CT was much more helpful in showing the soft tissue mass as well as the extent of bony disease. Only three patients in this study survived for five years. Present chemotherapy protocols were disappointing in the treatment of this highly lethal tumor. 相似文献
68.
69.
Use of a radioimmunoassay to quantify thrombospondin 总被引:8,自引:0,他引:8
Results of radioimmunoassay procedures applied to samples containing thrombospondin indicated that reliable values are obtained either in saline or in plasma. Plasma levels in apparently normal individuals ranged from approximately 20 to 300 ng/ml. The mean for 20 individuals was 175 ng/ml. Plasma specimens stored either refrigerated at 4 degrees C or frozen at -80 degrees C showed significantly diminished thrombospondin levels over a period of 90 days. Serum levels of thrombospondin were found to range from 10,000 to 30,000 ng/ml. 相似文献
70.