Many R unexplained
Results from > 50, 000 pregnancies reported in the late 70's (nelson et al.
)showed > 50% of cerebral palsy
cases had normal pregnancy
& delivery. Infants are born with true knots in the cord & many have loops of cord tight about the neck. Some have hx of maternal infection, drug exposures etc. Contrary to the lunch tv adds, most are not caused by drs.