title: Survival of spermatozoa in a human sperm bank. Effects of long-term storage in liquid nitrogen.
mesh_terms: D005260:Female; D005306:Fertilization; D005615:Freezing; D006801:Humans; D007315:Insemination, Artificial; D008297:Male; D009584:Nitrogen; D011247:Pregnancy; D011309:Preservation, Biological; D012661:Semen / Q000502:physiology*; D013094:Spermatozoa / Q000502:physiology*; D013997:Time Factors; D014015:Tissue Banks
chemical_list: D009584:Nitrogen