It seems fair to me. I don't see why the male has to be yoked into supporting a child that the mother /chose/ to have. Assuming the act of conception was mutually consensual?

Reproduction is just biased against the mother psychologically and biologically. But I don't believe in affirmative action for groups of people, whether segregated by race or sexuality or gender.

It seems to me that the sex act before conception is mutually consensual?

Just because the woman is usually the one screwed over when a child is had (we can add high blood pressure, diabetes, swollen legs, morning sickness, a whole list of complaints) means that she better be aware of her own body and take appropriate precautions when having sex. Should the issue of pregnancy come up, it seems to me that the child having is really on the onus of the woman. After all, what you said, all the guy does is contribute some gametes. It's not like he's going to face carrying the child to term.

The question for the woman is whether she chooses to do so for whatever reasons of her own. As for the risks, she should be aware of them as part of the deal of keeping the fetus.

Basically, I think people should be responsible for themselves and their own bodies. In the pregnancy case, yes, the woman suffers but that's her choice. I don't see why you have to force the man to accept responsibility for her body when there are alternative solutions.

For the risk level in these solutions, well, that's why people should take the pill/wear condoms/not have sex in the first place.