What portion of the mother's blood volume does the pregnant uterus hold approximately?

The correct answer indicates that the pregnant uterus holds approximately one-sixth of the mother's blood volume. During pregnancy, the body undergoes significant physiological changes, including an increase in blood volume to support the developing fetus and to prepare for the demands of childbirth. As the uterus grows, it becomes highly vascularized, leading to an increase in blood flow to the area.

In terms of blood volume, during pregnancy, a normal increase in maternal blood volume can be observed, where the total maternal blood volume may increase by up to 50%. However, the distribution of that volume involves various organs and tissues, with the pregnant uterus able to hold a substantial portion.

Thus, estimating that the uterus holds one-sixth of the total blood volume reflects this understanding of how much blood flow is directed to the uterus to sustain the pregnancy, support fetal development, and manage the physiological changes occurring in the mother's body. This knowledge is essential for EMTs and healthcare providers as they manage care for pregnant patients.