From Monday, Sep. 28, 1959
The dangers of pregnancy for women over 40 have been greatly exaggerated, says Obstetrician Albert L. Higdon of Teaneck, N.J. Before a Canadian meeting of obstetricians and gynecologists, he reported that studies of 21,000 mothers indicate that childbirth presents only slightly greater risks to a woman of 40 than to one of 20. The older women bore only a slightly higher percentage of Mongoloid children, suffered no more difficult deliveries, had an average mortality rate.
Source: http://www.time.com/time/magazine/article/0,9171,811285,00.html