Polyzoospermia: a definite pathologic entity.
Polyzoospermia has been repeatedly associated with reduced fertility and increased rates of spontaneous abortion. We examined semen samples of 1374 infertile men and found an incidence of 4.2% of semen with a sperm density exceeding 250 X 10(6) sperm cells/ml. The spontaneous pregnancy rate in 30 evaluated couples in whom the male partner presented with polyzoospermia was 38.7% and the spontaneous abortion rate was 25%. Sperm penetration tests revealed normal mucus-penetrating ability in 29 of 30 men examined. The reason for reduced reproductive performance in polyzoospermic men does not seem to be disturbed sperm mucus interaction.
Abortion, Spontaneous↗