Wow Celine, You simply don't get it. Your obvious disdain for the masculine sex is palpable, had your fair share of domineering partners that you are a little sour over?
I don't think that anybody is saying that a man should be able to put a stop to a woman's decision to have an abortion if she chooses to. It is her body and let's face it, unless the guy is 100% committed through thick and thin, she will take the brunt of the responsibility as well.
The point is that any healthy relationship requires communication on difficult topics. The woman can have the final say, but she should "always", in a healthy relationship, have the discussion with her SO. If only to help him come to terms with her decision and make him feel like more than a "Sperm Donor" as you put it.
That fact that you reduce the male role in this whole affair to the crude words of a "Sperm Donor", speaks absolute volumes. It is the equivalent of me standing around with my mates and talking about my SO by saying: "Ya the kitchen staff has been slacking lately, no need to consult her on whether I get to buy a new sports car with our family savings, her opinion does not reach outside the kitchen."