IN THE FALL of 1954, a 20-year-old woman developed acute
anterior poliomyelitis. She was at term, and the question of the
fetus being affected before or at birth was raised. Also, nine
days after diagnosis, when labor began, the question arose of
whether she should be permitted upon the maternity service, and
the neonate, in the nursery, of the local hospital. The mother
had passed the seven-day isolation requirement of the state of
California; it was felt that admission was reasonably safe. A
healthy boy was born. On the second day of life this infant
developed poliomyelitis. Eleven other infants, concurrently in
the nursery, were given gamma globulin. There were no observed
secondary cases. POLIOMYELITIS IN PREGNANCY Susceptibility to
and incidence of paralytic poliomyelitis appear increased in
pregnancy.In 95 cases collected by Aycock,* Fox and Sennett,3
and Waaler,4 wherein accurate comparison with the nongravid
female population appeared