title: The pregnancy rate, duration of infertility, months of treatment, and semen characteristics expressed in age-specific groups of couples attending a fertility service.
mesh_terms: D000328:Adult; D000367:Age Factors; D005260:Female; D005306:Fertilization; D006801:Humans; D007246:Infertility / Q000473:pathology / Q000628:therapy*; D007315:Insemination, Artificial; D008297:Male; D008875:Middle Aged; D011247:Pregnancy; D013094:Spermatozoa / Q000473:pathology; D013997:Time Factors