As the U.S. fertility rate continues to fall, there are growing concerns about the long-term economic impact: A smaller population means less tax revenue, which could reduce funding for programs such as Social Security and Medicare. But immigration policy reform could be one solution, some experts say. The U.S. birth rate fell slightly in 2022 compared with 2021, with roughly 3.7 million babies born nationwide, and the birth rate still hasn’t recovered to pre-pandemic levels, according to an initial analysis from the Centers for Disease Control and Prevention. A growing concern for economists, the U.S. fertility rate has generally been...