The easiest example: the uterus shrinks to its normal size after a while, but how does the body get rid of the extra tissue? How does it get metabolized? Through the kidneys, liver, guts…?
Much of the extra size is caused by blood and fluid in the tissue. A pregnant person’s total blood volume increases by 45% on average. After pregnancy excess blood volume is excreted via the kidneys, thus decreasing the tissue’s apparent size
Latest Answers