Kuka naimisissa Bertold Wiesner?

Bertold Paul Wiesner (1901–1972) was an Austrian-born physiologist. He is noted for coining the term 'Psi' to denote parapsychological phenomena; for his research into human fertility and the diagnosis of pregnancy; and for being the biological father of more than 600 people by anonymously donating sperm used by his wife the obstetrician Mary Barton to perform artificial insemination on women at her private practice in London.

Anna Wilhelmine Gmeyner (16 March 1902 – 3 January 1991) was an Austrian-born Jewish writer, playwright, and screenwriter who was exiled from Germany and Austria, best known for her novel Manja (1938). She also wrote under the names Anna Reiner and Anna Morduch. Her daughter was the children's writer Eva Ibbotson.

Mary Barton (1 March 1905 – 1990) was a British obstetrician who, in the 1930s, founded one of the first fertility clinics in England to offer donor insemination. Throughout her career, Barton studied infertility and conception. Her pioneering research and practice were inspired by experience as a medical missionary in India, where she saw the harsh treatment of childless women.

At the time, infertility was widely believed to be the woman's fault. Barton understood that both men and women could be infertile. Both the identification of the male as an infertile partner and the introduction of treatments that used "instrumental insemination" met with strong social disapproval. This was true even when using the husband's sperm, a process known as artificial insemination by husband, or AIH. Artificial insemination by donor, AID, was even more contentious, raising questions of adultery, illegitimacy, and perjury. This led to practices of secrecy.

In one of her research papers on fertility and conception, Barton reports successfully treating over 1,000 women using AID, 600 cases between 1944 and 1954 and another 431 women from 1955 to the end of December 1962. Thousands more women were treated at her clinic for AIH.

Barton's second husband, sex researcher Bertold Wiesner, is believed to have been in charge of recruiting sperm donors for Barton's clinic. He and a small number of other donors may have provided the majority of the sperm used, resulting in the birth of hundreds of half-siblings, most of whom had no knowledge of their conception. The clinic's patient records were destroyed, but DNA testing has identified groups of half-siblings. The Barton clinic has been the subject of the documentaries Offspring (2001) and Bio-Dad (2009) by Barry Stevens and of a play by Maud Dromgoole.