Our healthcare system in the United States is profit driven. By pathologizing pregnancy, by inducing and augmenting childbirth--an otherwise NORMAL condition--medical practitioners have the opportunity to drive up their profit margin. It is also why medical institutions are so against homebirth. They are so outspoken against it on the guise of it being unsafe, even though statistics show homebirth is the safest option for healthy, normal pregnancies. However, if women give birth at home, doctors, hospitals, pharmaceutical companies have no chance for profit.
The article Pathologizing pregnancy: it’s just good business from KippReport hits this concept right on the head.