The fourteenth amendment says "All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside. No State shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States; nor shall any State deprive any person of life, liberty, or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws." It doesn't say "conceived or naturalized in the United States" or "conceived and carried through X weeks of pregnancy or naturalized". If one believes in the "originalism" concept of interpreting the constitution it's difficult to see how the idea of federalism shouldn't grant the states entire jurisdiction over whether a not yet born person has any rights.