Final answer:
A fetus large for gestational age typically has increased fat deposition and normal-sized spleen and liver, with weight above the 90th percentile for its gestational period during the rapid growth in the second and third trimesters.
Step-by-step explanation:
The characteristics of a fetus that is large for gestational age are typically increased fat deposition and normal-sized spleen and liver. A fetus is considered large for gestational age if its weight is above the 90th percentile for its gestational age. This means that the fetus weighs more than 90% of other fetuses at the same number of weeks of gestation. During the second and third trimesters of pregnancy, rapid weight gain occurs, and this is when the fetus accumulates most of its body fat in preparation for birth. Increased fat deposition is a normal part of fetal development towards the end of pregnancy, particularly in the third trimester when organ development continues and the fetal growth rate peaks.