Assertion: cervical mucus | /r/CapableOf | prevent sperm
Facets:
value: from penetrating the cervix
type: TRANSITIVE-OBJECT
Source sentences:
text: Shortly after the menstrual period ends, the cervical mucus is dry and prevents sperm from penetrating the cervix but around the time of ovulation it becomes thin, has egg-white consistency, and is penetrable by sperm.