First off most miscarriages occur before 12 weeks gestation and women think they are having an unusually heavy period, so there is NOT a lot of psychological trauma to a heavy period, regardless of what some women want to tell you
. Less than 1% of them occur AFTER 20 weeks, and those women I am sure do suffer greatly, for the vast majority of them, it is NOT like walking in to your baby's room and finding the child dead from SIDS.
As to the four year old ten year old analogy, they are both alive as determined by the law and the constitution of this country. You think the founders had never heard of abortions, didn't know there were midwives out there helping women abort their pregnancy? If they had wanted to protect the unborn as citizens of this country they could have. They chose not to.