title: Serum hormone levels before and two years after vasectomy.
mesh_terms: D013196:Dihydrotestosterone / Q000097:blood*; D005640:Follicle Stimulating Hormone / Q000097:blood*; D006801:Humans; D007986:Luteinizing Hormone / Q000097:blood*; D008297:Male; D013739:Testosterone / Q000097:blood*; D013997:Time Factors; D014659:Vasectomy
chemical_list: D013196:Dihydrotestosterone; D013739:Testosterone; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone