In her book (and later a television show) "Call The Midwife", the author Jennifer Worth recalls that while she was in school she picked up a medical book from t

In her book (and later a television show) "Call The Midwife", the author Jennifer Worth recalls that while she was in school she picked up a medical book from the 1890s and she read this sentence: "Should labor continue for more than 10 days, the services of a doctor should be asked for."