A severe decline in child births has occurred over the past half century, which will lead to
considerable population declines, particularly in industrialized regions. A crucial question is …

DNA damage, largely owing to oxidative stress, is a leading cause of defective sperm
function. High levels of oxidative stress result in damage to sperm DNA, RNA transcripts …

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 …

Background Male infertility is a widespread condition among couples. In about 50% of
cases, couple infertility is attributable to the male partner, mainly due to a failure in …

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 …

Background Sedentary behaviour is associated with risk of depression. We review and
quantitatively summarise the evidence from observational studies in a meta-analysis …

Background Oligo‐astheno‐teratozoospermia is frequently reported in men from infertile
couples. Its etiology remains, in the majority of cases, unknown with a variety of factors to …

Background Semen quality, a predictor of male fertility, has been suggested declining
worldwide. Among other life style factors, male coffee/caffeine consumption was …

Clinical infertility is the inability of a couple to conceive after 12 months of trying. Male factors
are estimated to contribute to 30–50% of cases of infertility. Infertility or reduced fertility can …

Objective To study the relationship between semen quality and current health status in a
cohort of men evaluated for infertility. Design Cross-sectional study. Setting Fertility clinic …