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Differences in Teenage Pregnancy Rates Among Five Developed Countries：The Roles of Sexual Activity and Contraceptive Use
Teenage Pregnancy Rates Contraceptive Use Sexual Activity
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2009/9/16
Context: Adolescent pregnancy, birth, abortion and sexually transmitted disease (STD) rates are much higher in the United States than in most other developed countries.
Methods: Government statist...
Regional differences in luminal fluid polypeptides of the rat testis and epididymis revealed by two-dimensional gel electrophoresis
Regional differences luminal fluid polypeptides rat testis epididymis revealed two-dimensional gel electrophoresis
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2009/2/20
Luminal fluid samples were collected by micropuncture of the seminiferous tubule, rete testis, and defined levels of the epididymal tubule. After removal of spermatozoa by centrifugation, the supernat...
Individual differences in LH and FSH responses to orchidectomy and testosterone replacement therapy in rams
Individual differences LH FSH rams
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2009/2/19
Profiles of LH and FSH levels and pituitary LH responses to exogenous luteinizing hormone releasing hormone (LHRH) have been characterized in rams, castrated rams (wethers), and wethers implanted wi...
In vitro sperm-binding assay to distinguish differences in populations of human sperm or damage to sperm resulting from cryopreservation
Sperm quality fresh versus frozen semen
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2009/2/18
Annually, >1.3 million men are members of couples seeking help because of infertility. Semen from many of these men contains reasonable numbers of motile and normal sperm, but for a subset of indivi...
Ethnic differences in testicular structure and spermatogenic potential may predispose testes of Asian men to a heightened sensitivity to steroidal contraceptives
Spermatogenesis ethnicity
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2009/2/17
Spermatogenesis in Asian men appears to be more susceptible to suppression by steroidal contraceptives administered in clinical trials than spermatogenesis in Caucasian men. The objective of this ...
Sequence divergence within the sperm-specific polypeptide TCTE1 is correlated with species-specific differences in sperm binding to zona-intact eggs
Sperm egg binding zona pellucida evolution fitness
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2009/2/17
The T-complex-associated testes-expressed (TCTE1) gene encodes a novel sperm cell-specific polypeptide (TCTE1) that is conserved across vertebrate species. TCTE1 is absolutely required for fertili...
Differences in sperm motion between high- and low-shuttlebox avoidance rats（Hatano strains）
Computer-assisted sperm motion analysis alphachlorohydrin sperm velocity adenosine triphosphate strain differences
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2008/12/30
Sperm from the caudal epididymis of 2 inbred strains of Sprague-Dawley (SD) rats, selected on the basis of their high- or low-shuttlebox avoidance responses, were analyzed for motion characteristi...
Lack of significant morphological differences between human X and Y spermatozoa and their precursor cells（spermatids）exposed to different prehybridization treatments
significant morphological huma X and Y spermatozoa precursor cells
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2008/12/26
Human X and Y spermatozoa were previously compared by several nonmolecular techniques. Recent studies show that in many of the previous investigations, the methods used to identify the spermatozoa wer...
Marked Differences in Protamine Content and P1/P2 Ratios in Sperm Cells From Percoll Fractions Between Patients and Controls
Chromatin condensation male infertility Percoll gradients sperm chromatin sperm morphology sperm motility
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2008/12/19
The various sperm cell types present in a simple ejaculate differ in their motility and morphology. However, little is known about the nuclear maturity of these sperm cells and their relationship wi...
Detection of Differences in Fertility
Detection Differences Fertility
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2008/12/3
Andrologists need to measure fertility for at least 5 reasons. Each can be reduced to a simple question concerning fertility outcome after the administration of a therapy to a male or the use of a new...
Differences in sperm motion between high- and low-shuttlebox avoidance rats (Hatano strains)
sperm motion high- and low-shuttlebox rats (Hatano strains)
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2008/12/2
Sperm from the caudal epididymis of 2 inbred strains of Sprague-Dawley (SD) rats, selected on the basis of their high- or low-shuttlebox avoidance responses, were analyzed for motion characteristics...
Irreconcilable Differences? Intellectual Stalemate in the Gay Rights Debate
Irreconcilable Differences Intellectual Stalemate Gay Rights Debate
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2008/5/2
Thomas Caramagno's Irreconcilable Differences? Intellectual Stalemate in the Gay Rights Debate purports to be an unbiased examination of the rhetoric of the pro- and anti-gay rights debate. It succeed...