Which one of the following statements regarding the impact of physical activity on the cardiovascular health of pregnant women i
s most accurate? A. Physical activity during pregnancy increases the risk of miscarriage during the first trimester.
B. Physical activity during pregnancy may increase the likelihood of postpartum depression.
C. Physical activity during pregnancy does not increase chances of preterm delivery
D. Physical activity during pregnancy decreases the risk of fetal birth defects.
Likely the chronological age, mainly because it would explain the differences in puberty stages between the two boys, which is an example of physical maturation.