A midwife listens to the baby's heartbeat in Zanzibar, Tanzania

While Columbia has very high overall levels of trained health workers, over a quarter of the poorest will still deliver without skilled care

In Ethiopia 90% of women deliver without a trained health worker

In Nigeria women in rural areas are twice as likely to deliver without a trained health worker as women in urban areas

In India, only 10% of the most wealthy women deliver without a trained health professional, compared to around 80% of the poorest women