Final answer:
During pregnancy, the enlargement of the uterus, increased blood volume, and uterine contractions help protect against excessive bleeding during delivery.
Step-by-step explanation:
During pregnancy, there are several normal changes that help protect against excessive bleeding during delivery. One of these changes is the enlargement of the uterus. As the uterus grows, it compresses the blood vessels in the pelvic region, which hampers venous return from the legs. This helps prevent excessive bleeding during delivery.
Another change that protects against excessive bleeding is the increased blood volume. Blood volume increases during pregnancy to accommodate the demands of fetal nourishment and waste removal. The extra blood helps ensure that there is enough blood supply to prevent excessive bleeding during delivery.
In addition, uterine contractions continue for several hours after birth to return the uterus to its pre-pregnancy size. This process, called involution, helps prevent excessive bleeding by promoting the closure of blood vessels in the uterus.