How does intestinal absorption of calcium change during pregnancy?

During pregnancy, intestinal absorption of calcium increases significantly. This physiological change is crucial to support the growing fetus, as adequate calcium is essential for the development of the baby's bones and teeth. The body adapts by enhancing the efficiency of calcium absorption in the intestines to ensure that both the mother and the developing baby receive sufficient levels of this vital mineral.

The increase in calcium absorption is facilitated by hormonal changes during pregnancy, particularly the rise in levels of estrogen and parathyroid hormone-related peptide. These hormones stimulate the intestines to absorb more calcium from dietary sources, which is important since the demand for calcium is elevated during this time.

Thus, the correct response reflects the body's adaptation to meet higher nutritional needs, emphasizing the importance of calcium for both maternal health and fetal development throughout pregnancy.