Levels of hCG are measured in milli-international units per milliliter (mIU/ml). Beta-hCG levels are low early in pregnancy and rise throughout the first trimester, into the second trimester.

Below, we take a more in-depth look at hCG levels, how they're measured, and what they can mean throughout your pregnancy. We also provide a handy hCG levels chart for parents-to-be.

What exactly is hCG and how does it work? Do high hCG levels mean that you're pregnant with multiples? Learn more about what hCG is, how it is tested, and what high hCG levels mean. Spoiler alert ...

In the first 4 weeks of pregnancy, your hCG levels typically double about every 2 to 3 days. If you’re at risk for miscarriage, you’re more likely to have hCG levels that don’t double, or ...