Which case upheld abortion rights but allowed states to regulate abortion with undue burdens?

• A. Roe v. Wade
• B. Planned Parenthood v. Casey
• C. Duncan v. Louisiana
• D. Baker v. Carr

Answer: (B)

The main idea tested is balancing a constitutional right to abortion with the states’ power to regulate that right through rules that don’t block access. Planned Parenthood v. Casey reaffirmed that abortion rights remain protected, but it changed how courts evaluate state restrictions. Instead of a rigid trimester framework, the Court introduced the undue burden standard: a regulation is unconstitutional only if it places a substantial obstacle in a person’s path to a first-trimester abortion before fetal viability. This means states can require certain measures—like informed consent, waiting periods, or parental involvement for minors—as long as those rules don’t amount to an undue burden. The decision preserves the core right to choose while permitting reasonable regulations, and it also struck down measures that imposed a substantial obstacle, such as a spousal notification requirement. The other cases cited deal with different areas of constitutional law, such as jury rights or voting-related issues, so they don’t address abortion rights in the same way.