"In 2017, when we had a huge surge in cases, we decided to look into it," says Oei. The Royal Hospital for Women in Randwick, Australia, where she works, records 4,500 births on average each year. Until that year, they usually had only 10 requests for tongue-tie surgery every month. "We went from 10 a month, to 10 cases per week," says Oei.
