Infertility is a problem that affects millions of couples around the world. It is known as a
disease of couples, not individuals, which makes diagnosis difficult and treatment unclear …

The circadian clock coordinates physiology, metabolism, and behavior with the 24-h cycles
of environmental light. Fundamental mechanisms of how the circadian clock regulates organ …

STUDY QUESTION Can we identify diurnal oscillations in human semen parameters as well
as peak times of semen quality? SUMMARY ANSWER Human semen parameters show …

Highlights•The circadian system coordinates physiology and behavior with time of
day.•Hormones broadly affect central and peripheral physiology and behavior.•The …

Purpose Male infertility is a complex multifactorial pathological condition, and
asthenozoospermia (AZS) is one of the most common causes. Current evidence suggests …

Circadian rhythms have been found in some reproductive functions phenotypes but remain
unclear for sperm DNA fragmentation index (DFI). The present study aims to investigate the …

Current data support the modest effect of the circadian clock on male reproductive potential;
however, the evidence available is still fragmented and inconclusive. Additional well …

Female reproductive success requires multifaceted, temporally coordinated hormone
secretion. The circadian timing system is central to this complex neuroendocrine regulation …

We determine whether a suspected seasonal variability in semen quality affect subsequent
live birth rates. This is a retrospective, cohort analysis of men who provided semen analyses …

Recent studies have shown that the reduction of sperm count is associated with sleep
behaviors, including restricted/excessive sleep duration, late sleep time midpoint, and shift …