Sperm morphology and recurrent abortion

In 98 men whose partners experienced three or more spontaneous abortions, there were no significant differences in ejaculate volume, concentration of sperm, the percentage of total abnormal sperm, or the percentage of individual sperm defects as compared with normal WHO standards and 17 men fathering successful pregnancies. These data indicate that neither abnormal sperm concentration nor abnormal sperm morphology are significantly associated with recurrent spontaneous abortion.