Of the 6 children in my father's family, only the births of the 2 youngest were reported. They were they only ones born in a hospital and that was 1917 and 1919. My father's cousin was a premie twin who wasn't expected to live. His twin's birth was reported but his wasn't. (He just died at the age of 88.) In NYC, by the way, midwives were not required to report births at the beginning of the 20th century. Merle