
HealthJuly 1, 1952
The Umbilical Cord
Until recently curiously little was known about this lifeline of the fetus. Now physiologists, mathematicians and engineers have discovered some impressive things about its performance

The Umbilical Cord
Until recently curiously little was known about this lifeline of the fetus. Now physiologists, mathematicians and engineers have discovered some impressive things about its performance

Obstetrical Labor
The forces that propel an infant into the world have now been measured precisely by a technique largely developed for experimental engineering