Gigi was conceived in late 1957 at Dr. John Hamon’s offices, San Francisco.

Eugenia, known as Gigi, was conceived in late 1957 via artificial insemination from an anonymous sperm donor at Dr. John Hamon’s offices "450 Sutter Medical Building" on 450 Sutter Street, San Francisco, California, USA. She was born on September 7, 1958.

Two years later, Gigi’s parents requested the same sperm donor and her brother Josh was conceived in the spring of 1960. He was born on January 20, 1961.