The pairings bore more than 500 babies, and a few of those children have met the women and men whose genetic material they carry. This summer, Snowflakes, Nightlight’s embryo-matching offshoot, will mark its 20th anniversary at a picnic celebration with embryo providers, recipients and their children. In a new study, British researchers got a sneak peak at what members of these ultramodern families might experience when they meet in person for the first time.