A lot of spermatozoa with spherical head were revealed in histological research of spermatozoa smear. What may it cause?

A lot of spermatozoa with spherical head were revealed in histological research of spermatozoa smear. What may it cause?

1.  Increase of motility


2.  Spermatozoa dying


3.  Loss of flagellae


4.  Genetical disorders


5.  *Violation of purposeful movement