The home, which was run by an order of Catholic nuns and closed in 1961, was one of many such institutions that housed tens of thousands of orphans and unmarried pregnant women who were forced to give up their children throughout much of the 20th century.
In 2014, historian Catherine Corless tracked down death certificates for nearly 800 children who died at the home in Tuam between the 1920s and 1961 — but could only find a burial record for one child.
Thank you. I asked myself same. Telomeres I guess you would need to know the length after birth. But we only have one sample (moment of death). Plus the victims bodies are probably not very good preserved. My best guess is, the text is just not accurate and they might used DNA testing for different things (sex, etc).