BACKGROUND Numerous studies have reported declines in semen quality and other
markers of male reproductive health. Our previous meta-analysis reported a significant …

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 …

In brief Many aspects of the reproductive process are impacted by oxidative stress. This
article summarizes the chemical nature of reactive oxygen species and their role in both the …

Infection and inflammation are relevant entities of male reproductive disorders that can lead
to sub-/infertility. Associated damage of the testis of affected men and in rodent models …

Graphical abstract Abstract Infertility affects millions of couples worldwide. Oxidative stress
(OS) causes peroxidation of lipids and damage to spermatozoa, thus, reducing the quality of …

In modern post-transition societies, we are reproducing later and living longer. While the
impact of age on female reproductive function has been well studied, much less is known …

Background Cigarette smoking seems to have a negative impact on men's reproductive
health, but our knowledge of its effects on the reproductive function of Russian men is still …

BACKGROUND Family-planning policies have focused on contraceptive approaches to
avoid unintended pregnancies, postpone, or terminate pregnancies and mitigate population …

Because human same-sex sexual behavior (SSB) is heritable and leads to fewer offspring, it
is puzzling why SSB-associated alleles have not been selectively purged. Current evidence …

STUDY QUESTION How did the first two coronavirus disease 2019 (COVID-19) waves affect
fertility rates in the USA? SUMMARY ANSWER States differed widely in how their fertility …