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Relationships between computerized measurements of motion of frozen-thawed bull spermatozoa and fertility
computerized measurements motion frozen-thawed bull spermatozoa fertility
2009/2/23
A computerized system (CellSoft, CRYO Resources, Ltd.) was validated using video tapes of frozen-thawed bull spermatozoa diluted in filtered (0.2 micron) egg yolk-citrate extender (8 X 10(6) spermat...
Different testosterone and LH relationships in infertile men
Different testosterone LH relationships infertile men
2009/2/23
In both man and animals, changes in Leydig cell structure and function accompany seminiferous tubule damage. In this study of 1745 men attending an infertility clinic, 14% of men with elevated lev...
Dose and time relationships in the endocrine response of the irradiated adult rat testis
endocrine response irradiated adult rat testis
2009/2/23
The dose- and time-dependent responses for the interstitial and tubular compartments in irradiated adult rat testes are described. Leydig cell dysfunction, as indicated by increased serum LH (to a m...
Selective luminal absorption of L-carnitine from the proximal regions of the rat epididymis. Possible relationships to development of sperm motility
L-carnitine rat epididymis sperm motility microperfusion
2009/2/23
The absorption of L-carnitine from the duct of the proximal regions of the rat epididymis was investigated using a stopped-flow, split-droplet microperfusion technique. L-carnitine was absorbed from...
The Relationships Between Serum Testosterone and Prolactin Levels and Nocturnal Penile Tumescence（NPT）in Impotent Men
impotence serum testosterone serum prolactin nocturnal penile tumescence hyperprolactinemia
2009/2/19
Serum testosterone (T) and prolactin (PRL) levels, nocturnal penile tumescence (NPT), penile and brachial blood pressure, and bulbocavernosus reflex latency (BCR) were assessed in 172 impotent men r...
Pituitary-Testis Relationships in Paraplegic Men
paraplegia androgens gonadotropins prolactin
2009/2/19
Ten men aged 12 to 48 years with a complete neurophysiologic transection of the spinal cord (seven paraplegic, two quadriplegic, and one hemiplegic) were endocrinologically investigated to determi...
Changing relationships between testis size, Sertoli cell number and spermatogenesis in Sprague-Dawley rats
reproduction testes gametogenesis correlations
2009/2/6
Relationships between several reproductive characteristics were investigated in 25 Sprague-Dawley rats aged 60, 150, and 240 days (n = 75). Daily sperm production correlated with body weight (r = 0....
DNA integrity in human spermatozoa：relationships with semen quality
DNA integrity human spermatozoa relationships semen quality
2008/12/25
The literature contains conflicting evidence regarding the existence of DNA damage in spermatozoa from infertile male patients. To examine this phenomenon, we have studied ejaculated spermatozoa fro...
DNA integrity in human spermatozoa：relationships with semen quality
DNA integrity human spermatozoa relationships semen quality
2008/12/26
The literature contains conflicting evidence regarding the existence of DNA damage in spermatozoa from infertile male patients. To examine this phenomenon, we have studied ejaculated spermatozoa from ...
Relationships Between Serum Hormone Levels and Semen Quality Among Men From an Infertility Clinic
Epidemiology human male reproduction sperm thyroid
2008/12/24
Participation rates in epidemiologic studies on semen quality are generally very low, raising concerns as to the potential for selection bias. Since hormones both initiate and maintain spermat...
Temporal Relationships Among Testosterone Production, Steroidogenic Acute Regulatory Protein (StAR), and P450 Side-Chain Cleavage Enzyme（P450scc）During Leydig Cell Aging
Leydig cell cyclic AMP steroidogenesis Brown Norway rat
2008/12/22
Previous studies have shown that the capacity of Leydig cells from aged (21-24-month-old) Brown Norway rats to produce testosterone is reduced from young (4-month-old) levels, and that this is cor...