Twenty-five years after the birth of the first test-tube baby, an advisory panel to President Bush is leading an effort to increase government scrutiny of the hugely popular and minimally regulated branch of medicine known as assisted reproduction. The 18-member panel, the President's Council on Bioethics, plans to release a report on Thursday that recommends regulations that affect the research and practice of in vitro fertilization, according to several people familiar with the final version. Surprisingly, the report includes recommendations for legislation to govern embryo research that could, if adopted, break the impasse over human cloning and stem cell research,...