Huh . What part of the country are you in ? Around here , they are pretty much the norm . <| sep |> I think under the strict setup you provided 1 . The pregnancy happens by accident although all sensible precautions have been taken 2 . The only point you want to clarify being if in the basic concept of body autonomy forcing someone to do anything he is not directly willfully responsible for is a violation of this conceptthen yes , it is . But after this is cleared up you have to consider that neither Tom nor Jane live independent of the society they ' re a part of so they have to submit to some of the rules the society agreed on . It doesn ' t matter if they have the ability to leave the society if they don ' t agree with the rules . This discussion is moot anyway since it would go back to a discussion about core definitions of basic principles . Now , if we assume that Tom and Jane do have to comply to the same rules that apply to everybody else in their society , while it might be a violation of the basic concept of body autonomy , it is still morally and legally right to ask Tom for child support . On the other hand , if Tom and Jane were simply existing for themselves outside of any society and outside of all laws , and Jane would try to force Tom to pay child support although she opted in to birthing the child we must assume that this decision is a very clearcut yesno question without considering financial cost of an abortion , health implications , morality , emotions or the child ' s potential rights , then Jane would be in violation of Tom ' s body autonomy . Then again if Tom by accident harms Jane and does not provide any kind of support to her to regain full body autonomy say , he broke her spine while they were . I don ' t know . having sex so she ' s paralyzed and needs help for basic tasks would he not be required by standalone moral to partially give up his autonomy and accept responsibility for the accident ? I mean I don ' t like the fact that a simple mistake can have such a great impact on a person ' s life without him really having a choice but that ' s the risk you take if you have sex with someone . It is implied by all means necessary .