There are subtle differences between how residency training is organized in Canada as opposed to the United States. For example, M.D. graduates proceed directly into their residencies without the intermediate step of internship. However, this difference is somewhat superficial: for many residencies, the first postgraduate year (PGY1) in Canada is very similar to a rotating internship, with 1-2 month-long rotations in diverse fields. On the other hand, in Canada the graduate is often committed to a sub-specialty earlier than a similar American graduate.