Consider an HIV-positive pregnant woman who lives in drought-stricken rural Africa. She has walked several miles with a child on her back to reach the nearest health facility. Here, her child will receive some basic primary care and be vaccinated against measles and other vaccine-preventable diseases. This facility is small and provides only limited services; consequently, the woman will be unable to receive basic obstetric care here when she is ready to deliver her next child. For basic obstetric care, she must travel to a different clinic in another village. Reaching that clinic will be a challenge because there is.