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 …

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 …

BACKGROUND Reported declines in sperm counts remain controversial today and recent
trends are unknown. A definitive meta-analysis is critical given the predictive value of sperm …

Objective To examine the potential effects of lifestyle factors on male reproductive health.
Evidence of a global decline in human sperm quality over recent decades has been …

BACKGROUND Herein, we describe the consensus guideline methodology, summarize the
evidence-based recommendations we provided to the World Health Organization (WHO) for …

Infertility affects up to 12% of all men, and sexual dysfunction occurs frequently in men of
reproductive age, causing infertility in some instances. In infertile men, hypoactive sexual …

Over the past four decades, studies of various designs have reported spatial and temporal
trends in human semen quality. Several standardized-methodology studies in …

There is an emerging body of evidence suggesting that male infertility may be a harbinger of
future health. Potential associations between infertility and health may arise from genetic …

Context Male infertility is defined as the inability to conceive following 1 year of regular
unprotected intercourse. It is the causative factor in 50% of couples and a leading indication …

This systematic review investigated the effect of paternal obesity on reproductive potential.
Databases searched were Pubmed, Ovid, Web of Science, Scopus, Cinahl and Embase …