Casey held those state laws that restrict abortion before the fetus is viable create an undue burden on women seeking abortions, and are unconstitutional because they violate the Due Process Clause, a woman's right to due process under the Fourteenth Amendment to the U.S. Constitution. The Court also ruled that this right is not absolute and must be balanced with possible government interest and may be affected by medical advancements that allow premature babies to survive at younger gestational ages.[2]