Sperm donor pool shrivels when payments cease.
Collier
Roger
R
D000328:Adult; D002170:Canada / Q000453:epidemiology; D003075:Coitus; D006801:Humans; D007315:Insemination, Artificial / Q000706:statistics & numerical data; D008297:Male; D012959:Socioeconomic Factors; D013074:Sperm Banks / Q000706:statistics & numerical data; D013094:Spermatozoa; D014019:Tissue Donors / Q000706:statistics & numerical data*