Declining sperm quality in men of childless couples.
Glöckner
D
D
Clinic of Reproductive Medicine and Gynecologic Endocrinology, Otto-von-Guericke-University, Magdeburg, Germany.
Gaevert
K
K
Kleinstein
J
J
D000328:Adult; D005260:Female; D006801:Humans; D007248:Infertility, Male / Q000503:physiopathology*; D008297:Male; D013081:Sperm Motility; D013094:Spermatozoa / Q000502:physiology*