Final answer:
During pregnancy, cardiovascular changes occur, there is an increased risk of DVT, and blood volume increases by approximately 30 percent.
Step-by-step explanation:
During pregnancy, several changes occur in the body to support the growth and development of the fetus. These changes include cardiovascular changes, increased risk of DVT (deep vein thrombosis), and changes in blood volume.
Cardiovascular changes: Blood volume increases by approximately 30 percent during pregnancy. This increase in blood volume helps to meet the demands of fetal nourishment and waste removal. Additionally, the pulse and blood pressure rise moderately during pregnancy.
Increased risk of DVT: Due to the growing uterus, which compresses blood vessels in the legs and pelvic region, pregnant individuals are at an increased risk of developing deep vein thrombosis. This condition occurs when a blood clot forms in one of the deep veins of the body, usually in the legs.
Blood volume change: The increase in blood volume during pregnancy helps to support the needs of the growing fetus. By childbirth, blood volume exceeds its preconception level by 30 percent, which is approximately 1-2 liters.