When Louise Brown was born in London on July 25, 1978, she was a medical "first". She was the first ... what?

The birth of this baby in 1978 marked a revolutionary moment in medical history, offering new hope to couples struggling with infertility. For years, British physiologist Robert Edwards and gynecologist Patrick Steptoe had been working on a procedure to fertilize an egg outside the human body. Their collaboration, which began in the late 1960s, faced numerous scientific and ethical challenges. After many attempts, they finally achieved success with Lesley and John Brown, a couple who had been unable to conceive for nine years because of blocked fallopian tubes.

The technique, known as in vitro fertilization (IVF), involved retrieving an egg from Lesley's ovaries, fertilizing it with her husband's sperm in a laboratory setting, and then implanting the resulting embryo back into her uterus. Although the press dubbed the resulting child a "test-tube baby," the conception actually took place in a Petri dish. On July 25, 1978, Louise Joy Brown was born at Oldham General Hospital in England, the first human ever born using this method.

Her arrival was a global sensation and a major medical breakthrough, though it also sparked considerable debate. Despite the controversy, the successful birth paved the way for modern fertility treatments. For their pioneering work, Robert Edwards was awarded the Nobel Prize in Medicine in 2010. Since 1978, millions of babies have been born worldwide thanks to IVF and other assisted reproductive technologies, a legacy that all started with this single birth.