Vaginal flora and sperm survival.
D003075:Coitus; D005260:Female; D006190:Haemophilus / Q000302:isolation & purification; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008297:Male; D065006:Papanicolaou Test; D013094:Spermatozoa / Q000166:cytology*; D013997:Time Factors; D014621:Vagina / Q000382:microbiology*; D014626:Vaginal Smears