Hi, welcome to healthcaremagic.
I completely understand your concern and happy to tell you that warfarin
only affects baby when it is/was taken by mother and not by father.
In support to your research, warfarin given to mother during pregnancy
, increases birth defects, like skeletal abnormalities (also termed as foetal warfarin syndrome- hypoplasia
of nose, eye socket, hand bones, and growth retardation). It can also cause CNS defects, foetal hemorrhage, foetal death.
Hope this will help you.