This is a tougher question than it appears on the surface.
The 
obvious answer would be "Yes", the father had an equal share in 
producing the baby and should have an equal share in the decision to 
kill it. Just debating the whole issue kind of makes me sick.
But,
 I think this question goes much deeper. The decision on whether or not 
to consult with the father would seem to depend on the status of the 
relationship between the mother and the father. If the father had just 
skipped town, he might say "Sure, go ahead and kill it.", with no real 
concern for what happened. This could possibly persuade the mother to do
 something totally against her will.
How about the father who is 
an alcoholic and his vision of reality is never clear. Do we think that 
he would be in any position to give the mother any kind of worthwhile 
direction or advice?
On the other hand, if the father is totally 
against killing the baby and the mother proceeds with an abortion, she 
has no one to blame but herself. If the husband agreed, then he is fair 
game for the rest of their married or partner lives. She always has the 
right to say - "I only did it because you wanted me to". Could this 
situlation totally destroy a marriage?
This whole dilemma could be
 prevented if we could only realize that children are no more our 
"property" than are our wives or our husbands. Two people agreeing on 
killing a baby does not make it the right thing to do. Fathers need to 
stand up for the right thing, even when their wives or significant 
others won't.
Most fathers probably have no real idea of what 
actually goes on during the procedure and probably should be required to
 watch an abortion prior to signing any type of consent or agreeing to 
it.
I have known several single parent Dads who have done an 
excellent job in rearing their children and just wouldn't have things 
any other way.
Fathers are expected to provide the proper care for
 their children and are looked down upon when they don't. When there is a
 problem with children, it is usually Dad who must get involved in the 
situation and do his best to settle it.
If there is serious 
consideration of killing a baby, then why shouldn't Dad have his say? 
The only question here is - Who will make the determination as to 
whether or not the father is even qualified to give an opinion?
I am answering the question on the "Yes" side for the simple reason that there is no "Sometimes" answer available.
 
                        