Vonnegut's 2BR02B on Project Gutenberg

Max sez, "2BR02B, a story by Kurt Vonnegut, originally published in sci-fi mag 'World's of If' but never published in book form has turned up at Project Gutenberg." This story was also podcasted by The Time Traveller.

Everything was perfectly swell.

There were no prisons, no slums, no insane asylums, no cripples, no
poverty, no wars.

All diseases were conquered. So was old age.

Death, barring accidents, was an adventure for volunteers.

The population of the United States was stabilized at forty-million
souls.

One bright morning in the Chicago Lying-in Hospital, a man named Edward
K. Wehling, Jr., waited for his wife to give birth. He was the only man
waiting. Not many people were born a day any more.

Wehling was fifty-six, a mere stripling in a population whose average
age was one hundred and twenty-nine.

Link

(Thanks, Max!)