In the developing world, distance (from home to care) is one of the three major delays, and even in the USA, it's a factor in some women's maternal death, or near-miss. Aside from actual miles to care, the obvious distances are the ones backed by statistics (poverty, lack of prenatal care, skin color, lifestyle choices); but sometimes, we create distance out of vapor - out of assumptions.
Part of the problem in the US is that we simply don't know exactly why women are dying, or even how many are. It is hard to be aware when we don't have a system that tracks these deaths and near-misses in a uniform fashion in all 50 states. Let me state that plainly - many states do not even have "pregnancy-related" on the death certificate. If we don't ask the question, how will we ever know the answer?