It is predicted that Japan and European Union will soon experience appreciable decreases
in their populations due to persistently low total fertility rates (TFR) below replacement level …

To date 15% of couples are suffering from infertility with 45–50% of males being
responsible. With an increase in paternal age as well as various environmental and lifestyle …

A total of 1,215 young Danish men aged 18–28 years were recruited between 2008 and
2012 when they attended a compulsory medical examination to determine their fitness for …

Objective Study associations between three measures of alcohol consumption (recent,
typical/habitual, binging), semen quality and serum reproductive hormones. Design Cross …

Objective To evaluate the association of sleep parameters on female and male reproductive
functions. Design Systematic review. Setting Not applicable. Patient (s) Female and male …

Objective To study the associations between self-reported psychological stress, semen
quality, and serum reproductive hormones among young Danish men. Design Cross …

Background Short sleep duration and poor sleep quality are increasingly prevalent in
modern society and may be associated with impaired semen quality, yet studies are …

Abstract Study Objectives: To investigate the association between sleep duration and semen
parameters as well as reproductive hormone levels. Methods: We designed a cohort of male …

STUDY QUESTION How are temporal trends in lifestyle factors, including exposure to
maternal smoking in utero, associated to semen quality in young men from the general …

Objective To evaluate the influence of sleep loss on sexual behavior, hormone levels, sperm
parameters, and testis-specific gene expression in male rats. Design Experimental research …