Maternal morbidity and severe obstetric complications remain a global compelling dilemma about risks of severe pregnancy and childbirth outcomes (maternal mortality, e.g.). The new millennium yielded new tremendous success to all spheres of life, but humanity yet has not been able to solve the maternal mortality issue costed us annually 303.000 women. Globally dominant cause of maternal mortality is postpartum bleeding increased out of 68% in 1990 up to 80% in 2015. The national obstetrics guidelines state a blood loss more than 1000 ml of blood or more than 15% of the circulating blood volume and more than 1.5% of body weight as massive obstetric haemorrhage. Diagnosis-in-time of postpartum bleeding is an extremely important task. Recommended diagnostic methods (visual, physical, clinical, laboratory and instrumental) do not show an adequate assessment the real volume of blood loss. This situation is up to dynamic changes in a woman’s body during pregnancy, childbirth and the postpartum period. This question might be helped out with methods of automatic non-invasive blood volume monitoring of postpartum uterus cavity coupled to the estimation of the external blood loss volume to assess the development of postpartum haemorrhage.