beta hCG
Pronunciation: BAY-tah H-C-G
A blood test measuring the beta subunit of human chorionic gonadotropin hormone to confirm and monitor early pregnancy.
Full Definition
Beta hCG refers to a quantitative blood test that measures the beta subunit of human chorionic gonadotropin, the hormone produced by the developing placenta after embryo implantation. This test is the gold standard for confirming pregnancy after fertility treatment, typically performed 10-14 days after embryo transfer. Beta hCG levels should approximately double every 48-72 hours in early normal pregnancy, and serial measurements help assess pregnancy viability. Values are reported in milli-international units per milliliter (mIU/mL) and must be interpreted in context of gestational age.
Usage
Usage note: Always include the numeric value and units (mIU/mL) when documenting results.
In Context
- "The patient's beta hCG level was 245 mIU/mL at 12 days post-transfer." — Pregnancy test result
- "Serial beta hCG values showed appropriate doubling, confirming viable pregnancy." — Early pregnancy monitoring note