On June 12, 1922, Mrs. Louise Huse, age 30, died at Chicago's Mid West Hospital from a criminal abortion performed there that day. On June 16, midwife Agnes Tholl was arrested on the recommendation of the coroner.
During the first two thirds of the 20th Centurey, while abortion was still illegal, there was a massive drop in maternal mortality, including mortality from abortion. Most researches attribute this plunge to improvements in public health and hygiene, the development of blood transfusion techniques, and the introduction of antibiotics. Learn more here.
Keep in mind that things that things we take for granted, like antibiotics and blood banks, were still in the future. For more on pre-legalization abortion, see The Bad Old Days of Abortion.