Same thing for me. I favor the legality of abortion. I don't think that a person's sexual morality is an appropriate place for government. However, barring any convincing evidence to the contrary, I believe life begins at conception (though I bristle at the phrase because of it's modern political connotations). Therefore, I think it's morally wrong.
Look, I also think adultery should be "legal" in that I don't think you should go to jail for cheating on your spouse. I still think it's wrong.