HANK MORGAN / SCIENCE PHOTO LIBRARY HANK MORGAN / SCIENCE PHOTO LIBRARY
In vitro fertilisation (IVF): IVF baby Nicholas Flickinger, the younger of two twin boys conceived on the same day by IVF, but born a year and a half apart. The twins' mother, Catherine, began IVF treatment at the Jones Institute in Norfolk, Virginia, in November 1986. Several of these were implanted in her womb & she became pregnant, giving birth to her first son, David, the following summer. The remaining fertilised eggs were frozen for later use. Catherine underwent a second successful embryo transfer, from the same batch of eggs, in May 1988, giving birth to Nicholas in 1989.
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