The male factor in fertility and infertility.  VIII.  A study of variation in semen quality.
D005298:Fertility; D006801:Humans; D007246:Infertility; D007248:Infertility, Male / Q000209:etiology*; D008297:Male; D012661:Semen; D055101:Semen Analysis
SEMEN; STERILITY, MALE/etiology and pathogenesis