Just before Lesley Brown naturally ovulated on November 9, 1977, she underwent laparoscopic surgery to aspirate the fluid in her left ovary, which contained a single egg. It was fertilized with the sperm of Lesley’s husband, John. Three days later, the resulting embryo contained eight cells and was transferred into Lesley’s uterus. On July 25, 1978, history was made with the arrival of the first baby conceived via in vitro fertilization (IVF).