[Clinical guideline. Obstetrical hemorrhage in the second half of pregnancy].

Pregnancy at older ages and the increased frequency of caesarean births may increase the incidence of diseases associated with obstetric haemorrhage. Obstetric haemorrhage is the second leading cause of maternal mortality, preceded only by preeclampsia-eclampsia in Mexico and the Instituto Mexicano del Seguro Social. In recent years several studies have been conducted to improve the detection, diagnosis and treatment of women at risk of obstetric haemorrhage to reduce maternal and perinatal mortality.