Is human fecundity declining in Western countries?

Methodological Issues in Analyzing Time Trends in Biologic Fertility: Protection Bias

(2009) Jane Key et al.   AMERICAN JOURNAL OF EPIDEMIOLOGY

Time Trends in Human Fecundability in Sweden

(2009) Thomas H. Scheike et al.   EPIDEMIOLOGY

Evaluating testis function non-invasively: how epidemiologist–andrologist teams might better approach this task

(2009) R.P. Amann   HUMAN REPRODUCTION

World Health Organization reference values for human semen characteristics*‡

(2009) Trevor G. Cooper et al.   HUMAN REPRODUCTION UPDATE

Validity of Self-Reported Time to Pregnancy

(2008) Maureen A. Cooney et al.   EPIDEMIOLOGY

Declining Worldwide Sperm Counts: Disproving a Myth

(2008) Harry Fisch   UROLOGIC CLINICS OF NORTH AMERICA

Declining trends in conception rates in recent birth cohorts of native Danish women: a possible role of deteriorating male reproductive health

(2007) Tina Kold Jensen et al.   INTERNATIONAL JOURNAL OF ANDROLOGY