What are some physical issues a surrogate mother may experience during pregnancy?

Morning sickness and weight gain are indeed common physical issues that a surrogate mother may experience during pregnancy. Morning sickness, which involves nausea and vomiting, often occurs during the first trimester due to hormonal changes as the body adapts to pregnancy. It affects many pregnant individuals regardless of whether they are surrogates.

Weight gain is also a typical physical outcome during pregnancy, as it is necessary for the health of the developing fetus. It reflects the increase in body fluids, blood volume, breast tissue, and the fetus's own growth.

While the other options describe various conditions and concerns, they are not as common or universally applicable to all surrogate pregnancies. For instance, high blood pressure and diabetes can occur but are not experienced universally by all pregnant individuals. Similarly, increased anxiety and stress may be psychological aspects rather than strictly physical issues, and immune system disorders, while potential concerns, are less commonly associated with the typical experience of pregnancy.