Assertion: semen's sperm | /r/HasProperty | infertile
Facets:
Source sentences:
text: It is not known why the shorter sperm are infertile, though it has been suggested that the slightly wider head of the infertile type might prevent it from entering the micropyle of the egg.
text: It is not known why the shorter sperm are infertile, though it has been suggested that the slightly wider head of the infertile type might prevent it from entering the micropyle of the egg.