I thought you may find this interesting 
https://infertilityblog.blogspot.com/2010/07/sperm-morphology-new-guidelines.html
For those of you who want more details, here is the link.
www.who.int/reproductivehealth/topics/infertility/cooper_et_al_hru.pdf

https://infertilityblog.blogspot.com/2010/07/sperm-morphology-new-guidelines.html
For those of you who want more details, here is the link.
www.who.int/reproductivehealth/topics/infertility/cooper_et_al_hru.pdf