Can abnormal shaped sperm lead to miscarriage?

[Mamabooksbabynumber2]

Hi,
My dp has more than average abnormal shaped sperm.
I found out I was pregnant 2 days ago just before our appointment with the gynocologist. We've been trying for 14 months.
Is there a risk of miscarriage more so if he has abnormal sperm ? Should I be asking this to a doctor or is this an odd thing to worry about?

I have no medical knowledge in that area, but if you're already pregnant then the sperm has done its job to combine with your egg and no longer really exists. Unless the shape of it affects the genetic material it carries?