When life was declared as an unalienable right given by God in the Declaration of Independence, and when the 5th and 14th Amendments to our U.S. Constitution speak of protections for life, life in the womb was certainly included and was expected to be protected by law.
The founders of our nation were not unfamiliar with abortion. In 1652 a conviction was handed down in Maryland for “intent to abort,” and in 1656, a woman was arrested for murder after procuring an abortion. (Proprietary v. Mitchell in Archives of Maryland, Vol. 10, (Baltimore: Maryland Historical Society, 1936. p.182-185; 464.)