Subsequent to the acceptance of Pasteur's germ theory was when sanitary practices were adopted by the medical industry, and in America circumcision became the practice for all males born in hospitals unless a parent objected. Only those Gentiles born in environments that were poor or rural and circumcision was neither practical nor economical when delivery was not attended by a physician, especially when poverty conditions prevailed.
While unlicensed midwives were lawful and quite common for home births, Gentles made no provision for circumcision out of the clinic. It would probably been unlawful by someone not licensed for it, even a registered nurse I suppose.
The early church soon abandoned this procedure as a requirement for an ndividual to be counted as a fully accepted constituent of the Christian Faith, although a preference for it as a matter of personal cleanliness was not actively discouraged.
I suppose Americans were quite filthy in the 19th Century. Now with modern sanitation, that's no longer an issue. It's an outdated practice and America is an outlier in the West. (Not including Israel)