Great Grand Aunt Grace

This is Grace Killmayer Kruepel. She was my great grandfather's (John Killmayer) sister. Even though she never had any children she was a midwife to many. She helped to deliver my grandmother Grace and her siblings. She also helped to deliver my mother.
I always wonder how many babies she helped to bring into the world.
My great grandmother (Mamie) kept a journal and one entry states that Aunt Grace took her stillborn baby to a doctor at Johns Hopkins Hospital.
At the time autopsies were illegal and I assume this was her contribution to science.