Haya El Nasser & Paul Overberg:

In 1960, the year Helen Cini gave birth to one of her five children, 15 other kids were born on her block here in this quintessential postwar American suburb.
The local obstetrician was so busy he often slept in his car.
Kathy Bachman felt like an oddity when her family moved to Cherry Lane in the Crabtree section of Levittown when she was 5. She was an only child, and “everybody had five or six kids in every house.”
Fast-forward to 2011.