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OBJECTIVE To determine whether semen quality has changed in the United States over the last 25 years. DESIGN Retrospective review. SETTING Three U.S. sperm banks, Cryogenic Laboratories, Inc. (Roseville, Minnesota), Idant Laboratories (New York, New York), and California Cryobank, Inc. (Los Angeles, California). INTERVENTION None. MAIN OUTCOME(More)
The meiotic segregation of 24 spermatozoa obtained from a 47,XXY male is described. Three-colour fluorescence in-situ hybridization with probes for chromosomes X, Y and 18 was used. Five spermatozoa carried an X chromosome, seven carried a Y, six had an XY gonosomal complement, five were missing the sex chromosome and one spermatozoon was presumably diploid(More)
PURPOSE The purpose of this study was to assess the predictive value of a modified form of Kruger's strict criteria for sperm morphology for pregnancy outcomes after intrauterine insemination (IUI) and controlled ovarian hyperstimulation (COH) in the presence of normal sperm concentration and motility. MATERIALS AND METHODS A retrospective review of 42(More)
OBJECTIVE To determine whether geographic variations in sperm counts might bias conclusions drawn from studies of semen quality. DESIGN Reanalysis of published data from a meta-analysis of 61 studies from 1938 to 1990 that concluded a worldwide decline in semen quality over the last 50 years. MAIN OUTCOME MEASURES Influence of geographic location on(More)
Transurethral resection of ejaculatory ducts has become an effective surgical treatment for male infertility caused by ejaculatory duct obstruction. We report on a patient treated successfully by transurethral resection of the ejaculatory ducts for a large midline cyst who postoperatively complained of terminal urinary dribbling lasting several minutes. On(More)
OBJECTIVES To determine the trend of hypospadias incidence in New York State (NYS) by retrospectively evaluating both the incidence and surgical repair rates of hypospadias. Epidemiologic studies in the United States and Europe have suggested an observable trend in the incidence of hypospadias during the past 30 years. A comparison of the results from these(More)
Couples are waiting longer to have children, and advances in reproductive technology are allowing older men and women to consider having children. The lack of appreciation among both medical professionals and the lay public for the reality of a male biological clock makes these trends worrisome. The age-related changes associated with the male biological(More)
PURPOSE Recent reports suggest declining sperm counts in the United States. These reports did not include all available data and did not account for geographic variations noted in prior studies. We examined all available data on U.S. sperm counts and evaluated whether geographic variations account for the decline suggested. MATERIALS AND METHODS We(More)
PURPOSE Hypospadias incidence rates have been widely reported to be increasing. During the last 20 years there has been a significant increase in the number of women who delay childbearing until their mid 30s. Therefore, it was of interest to determine if increasing maternal age is an independent risk factor for hypospadias. MATERIALS AND METHODS Data(More)