Equal quantities of sperm and<unk>  are mixed, so there is no interface. If there are antispermal antibodies present, more than 25% sperms show shaky movements. Cross-checking the<unk><unk>  with another donor semen will confirm whether antibodies are<unk>  or seminal.
Sperm–cervical mucus contact test
Postcoital test
Hamster zona-free ovum test
Vaginal wet mount
Vaginal ultrasonography
Sperm sorting
Karyotype
Fertility testing