Sperm selection capacity of cervical mucus.

Seventeen couples who attended the Infertility Clinic for routine fertility investigations were used in the study. Complete morphological examinations were performed on the ejaculates and cervical mucus samples following coitus in order to determine the morphological selective capacity of the mucus. It was concluded that both the motility of the spermatozoa and ability of the cervical mucus to select morphological abnormal spermatozoa contributed to the high percentage of normal spermatozoa present in the cervical mucus during the post coital test.