The topic is very interesting. First, I'll start with myself and my brothers' experience, a little of what I know, after we emigrated to the US for a while because of my dad's job.
Being from Spain, here in the 80s to the 2000s was a time of change and transition. Circumcision, referred to in the medical and social system as the phimosis operation, why was it usually only recommended for that one reason.
When my parents went through the entire visa process, one of the requirements was a general medical exam, done by doctors recommended by the US embassy. I was circumcised for medical reasons when I was practically 7 years old. But from comments made by my brothers and parents, I know that circumcision was recommended for my three brothers, two older and one younger, either in Spain before emigrating or in the US, once in the medical system.
My parents say they weren't sure and since it wasn't mandatory, they decided to wait to investigate and see how my siblings adapted to life in the US.
In the six years we lived in the US, the subject never came up again, but my siblings did mention that it was somewhat awkward in the school showers; luckily, they're intelligent.
I was the only one who stayed in the US, got married and has three children, none of them circumcised. Of course, they're not in the same era anymore; to date, they haven't experienced any social pressure, but medically, I have had to change pediatricians a couple of times because of his inappropriate comments. Clearly pro-circumcision, one older doctor and one younger doctor.