Irregular Sperm

It was found out that there is a very low probability that you will fertilize your partner’s egg on its own if you have a little to no sperm, poor sperm motility, or irregular shaped sperms.

This male infertility problem can be detected through semen analysis. There is no symptom if you have this kind of condition and there are possible solutions to have children. Fertility drugs, artificial insemination with donor sperm or with your own if your count, shape, and motility are not too abnormal or intracytoplasmic sperm injection (ICSI) are some of these solutions. 

Source : http://aboutmypregnancy.blogspot.com/2010/10/irregular-sperm.html