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 …

Approximately 21% of women of reproductive age and 22% of men of reproductive age in
the United States smoke cigarettes. Substantial harmful effects of cigarette smoke on …

Across the Western World there is an increasing trend to postpone childbearing.
Consequently, the negative influence of age on oocyte quality may lead to a difficulty in …

Low front-end cost and rapid accrual make Web-based surveys and enrolment in studies
attractive, but participants are often self-selected with little reference to a well-defined study …

Healthy lifestyle habits spanning from preconception to postpartum are considered as a
major safeguard for achieving successful pregnancies and for the prevention of gestational …

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 …

STUDY QUESTION To what extent is cigarette smoking associated with reduced
fecundability? SUMMARY ANSWER Current female smokers, particularly those who had …

The main risk factors for important reproductive health issues such as subfertility and
perinatal mortality largely originate in the periconception period. To evaluate associations …

This study reviews the scientific literature on the noxious effects of cigarette smoke on the
ovarian follicle, and the cumulative data on the impact of smoking on in vitro fertilization (IVF) …

During the past decade, as the use of assisted reproductive technologies (ART) has
continued to increase worldwide, research investigating whether modifiable lifestyle factors …