What Are Normal HCG Levels During Early Pregnancy?

Human chorionic gonadotropin, or hCG, levels during pregnancy range from 5 to 50 milli-international units per milliliter at three weeks to 25,700 to 288,000 at nine to 12 weeks gestation, states the American Pregnancy Association. Levels of hCG drop to 3,640 to 117,000 by weeks 25 to 40.

A woman’s hCG levels double every 48 to 72 hours in about 85 percent of normal pregnancies, and after five to six weeks of gestation, ultrasounds provide a more accurate assessment of the developing fetus’s health than hCG levels, states the American Pregnancy Association. While doctors don’t routinely check hCG levels unless other risk factors are present, a physician may choose to recheck levels that are lower or higher than average in 48 to 72 hours to monitor changes in the levels.