Science on the Edge - Test Tube Babies

The successful birth of the world's first test-tube baby in England--Louise Brown--heralded a new age in reproductive medicine. Since then, many such children have been born and the promise of this technology continues to grow. In vitro fertilization has created new possibilities and re-kindled hope for thousands of couples that suffer from infertility and related issues. But with this hope has also come controversy. What are the rights of sperm or egg donors? And should humans exercise the ability to make babies in this "unnatural" way? (20040401)