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 …

Semen quality has declined especially among Western men. Experimental and
epidemiological studies have shown potential links between exposure to environmental …

Introduction There has been no report regarding the impact on male sexual life or sexual
function by changes in lifestyle during the coronavirus disease 2019 (COVID-19) epidemic …

Background The preconception period represents transgenerational opportunities to
optimize modifiable risk factors associated with both short and long-term adverse health …

Subfertility affects one in seven couples and is defined as the inability to conceive after 1
year of regular unprotected intercourse. This article describes the initial clinical evaluation …

BACKGROUND Air pollution is both a sensory blight and a threat to human health. Inhaled
environmental pollutants can be naturally occurring or human-made, and include traffic …

Background Although many studies have proven the harmful effects of smoking on human
health, the associations between smoking status and infertility are limited in large …

E-cigarettes, a comparatively new phenomenon, are regarded as a safer alternative to
conventional cigarettes. They are increasingly popular among adolescents of both sexes …

Background Guidance to improve fertility includes reducing alcohol and caffeine
consumption, achieving healthy weight-range and stopping smoking. Advice is informed by …

Background Animal and epidemiologic studies indicate that air pollution may adversely
affect fertility. However, the level of evidence is limited and specific pollutants driving the …