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Amy E.T. Sparks

2013

Cross-Sectional Studies

Articles 1 - 2 of 2

Full-Text Articles in Medicine and Health Sciences

Semen Quality In Fertile Men In Relation To Psychosocial Stress, A. Gollenberg, F. Liu, C. Brazil, E. Drobnis, D. Guzick, J. Overstreet, J. Redmon, Amy Sparks, C. Wang, S. Swan Jun 2013

Semen Quality In Fertile Men In Relation To Psychosocial Stress, A. Gollenberg, F. Liu, C. Brazil, E. Drobnis, D. Guzick, J. Overstreet, J. Redmon, Amy Sparks, C. Wang, S. Swan

Amy E.T. Sparks

OBJECTIVE: To examine the association between stressful life events and semen parameters. DESIGN: Cross-sectional analysis in a pregnancy cohort study. SETTING: Prenatal clinics in five U.S. cities. PATIENT(S): Fertile men (n = 744) in the Study for Future Families, a cohort study of pregnant women and their partners. INTERVENTION(S): None. MAIN OUTCOME MEASURE(S): Sperm concentration, percent motile, and percent normal morphology and classification above/below World Health Organization (WHO) cutoffs for semen quality. RESULT(S): After adjusting for confounders, men reporting 2+ recent stressful life events had an increased risk of being classified below WHO thresholds for "normal" defined by concentration, motility, …


Serum Inhibin-B In Fertile Men Is Strongly Correlated With Low But Not High Sperm Counts: A Coordinated Study Of 1,797 European And Us Men, N. Jorgensen, F. Liu, A. Andersson, M. Vierula, D. Irvine, J. Auger, C. Brazil, E. Drobnis, T. Jensen, P. Jouannet, J. Overstreet, J. Redmon, Amy Sparks, J. Toppari, C. Wang, N. Skakkebaek, S. Swan Jun 2013

Serum Inhibin-B In Fertile Men Is Strongly Correlated With Low But Not High Sperm Counts: A Coordinated Study Of 1,797 European And Us Men, N. Jorgensen, F. Liu, A. Andersson, M. Vierula, D. Irvine, J. Auger, C. Brazil, E. Drobnis, T. Jensen, P. Jouannet, J. Overstreet, J. Redmon, Amy Sparks, J. Toppari, C. Wang, N. Skakkebaek, S. Swan

Amy E.T. Sparks

OBJECTIVE: To describe associations between serum inhibin-b and sperm counts, adjusted for effect of time of blood sampling, in larger cohorts than have been previously reported. DESIGN: Cross-sectional studies of spermatogenesis markers. SETTING: Four European and four US centers. PATIENT(S): Fertile men (1,797) were included and examined from October 1996-February 2005. INTERVENTION(S): The study was observational and therefore without any intervention. MAIN OUTCOME MEASURE(S): Associations between inhibin-b and semen variables controlled for time of blood sampling and other covariates. RESULT(S): Inhibin-b decreased about 2.00% per hour from 8 am-12 pm and then about 3.25% per hour from 12 pm-4 pm. …