"Why I don't regret my abortion"

Giving birth imposes unnecessary risks, hazards and responsibilities on a sentient being that has not given consent, with the justification that the imposer/bestower believes that there are likely to be benefits which would make the risks worthwhile (in the estimation of the person who is imposing life). That would be considered morally wrong in any other context, and I don't think that birth should be any different just because we cannot request consent from the foetus.

Ideally, women should take precautions to avoid becoming impregnated. However, in the event that a pregnancy does occur, then the most ethical course of action would be to terminate the pregnancy.