If your self image interfers with your accepting the images as pornographic, maybe you will accept "obscene." The definition of obscene being:
Repulsive; disgusting; Offensive to accepted standards of decency.
But what's worse is that these babies are being killed now. Would you have objected to a billboard campaign in Germany during WWII showing photos of bulldozers plowing piles of corpses?
At what point do you believe that a fetus actually becomes human, just out of curiosity? They somehow miraculously transmute at the moment they leave the birth canal? Or perhaps you agree with Peter Singer, and believe that infanticide is okay up to the end of the first year of life? Or perhaps your argument is that it's okay to kill them because they are dependent upon the mother--so do you then believe in killing those on respirators or dialysis machines? The point is, there is no logical defense for abortion.
Pregnancy may not always be welcome or convenient for some, but for those cases: adoption is the option.