Spermatozoa penetration:PrThr:Pt:Semen+Cvm:Ord
spermatozoa penetration:prthr:pt:semen+cvm:ord
Spermatozoa penetration:Presence or Threshold:To identify measures at a point in time:Semen+Cervical mucus:Ordinal
spermatozoa penetration:presence or threshold:to identify measures at a point in time:semen+cervical mucus:ordinal