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Aims To compare sperm counts for two groups of men who had presented for infertility investigations approximately 20 years apart. Methods The study compared results for 309 men tested between 1977 and 1981 with those of 559 men tested between 1997 and 1998 using identical methodology. In order to approximate the normal population, only those men with counts above 5 million/mL were included in the...
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