Clinical Laboratory DX Exam 2 Practice 2026 - Free Clinical Laboratory Practice Questions and Study Guide

Maternal AFP levels reflect how much AFP the fetus is producing, since AFP is mainly produced by the fetal liver and yolk sac and then enters the mother's bloodstream. When fetal liver cells are damaged or necrotic, their ability to produce AFP drops, leading to decreased AFP in maternal serum. In contrast, tumors that secrete AFP, such as hepatocellular carcinoma or certain germ cell tumors of the ovary or testis, would raise maternal AFP levels because they’re adding more AFP to the circulation. Therefore, among the listed conditions, liver cell necrosis would be associated with decreased maternal AFP, while the others would tend to increase it.