An equally important factor, which as far as I could tell went unmentioned in the forum, is that pregnancy is not a condition forced on most people. Other than the case of rape — an important but very limited exception — people choose to have sex. And having sex is what yields babies. That means most pregnancies are the result of voluntary action if not explicit intent.

Making the point is not a censorious attempt to punish people who abandon traditional religious strictures regarding sex. Rather, it is to indicate that in a typical case parents have what should be an obvious moral responsibility for the children that they create. Bring someone into the world, even if inadvertently, and you bear some obligation for and to the resulting life.

There is nothing unique about this argument. Conduct normally has consequences even if the specific result was not intended. Drive recklessly or drunk and you will be held liable if you cause harm — even if that was not what you planned to do. Shoot and kill someone without justification (e.g., self-defense) and you will be held responsible, even if his or her death was not your intent. Although mens rea will, appropriately, affect charge and punishment, lack of desire does not mean exoneration.