The problem with the argument that once you have axe you accept the risk is somewhat faulty. First there's the issue that others have mentioned that consenting to sex and consenting to possible pregnancy is not the same thing. In that vein I would ask what about those who use the pill but get pregnant anyway? What if the man has had a vasectomy or had been otherwise deemed infertile but the gal gets pregnant anyway? How about broken condoms? Ineffective spermicides? The couple have in these cases taken precautions and assumed there was no risk and still ended up with a pregnancy. The analogy falls apart.
The other issue I take is that it punishes women for their sexuality. She wants sex? Deal with the possible consequences. Men don't have to consider these consequences. Men don't suffer permanent changes to their body or risk fatal complications.
The other issue I take is that it punishes women for their sexuality. She wants sex? Deal with the possible consequences. Men don't have to consider these consequences. Men don't suffer permanent changes to their body or risk fatal complications.