In an article written by Abi Cotler O'Roarty in the Huffington Post, states that:
By way of contrast, in the U.S. today, labor is medically induced or augmented 80 percent of the time in hospital births, versus. 9.5 percent in 1991 (Martin and associates, 2009). The use of an Electronic Fetal Monitor throughout labor has also steadily risen since its invention in the 1970s to the current rate of 75 percent, though women continuously hooked up to one cannot move around freely while laboring. And one in three women now have cesarean births, up from 1965 when it was the 4.5 percent that the World Health Organization still recommends.
It seems all women must have their baby by week 41 and most women "need help." We have not made strides in birth but in the reverse. Thank-goodness for doctors like Dr. Biter in San Diego.