Beta hCG is the hormone of pregnancy. A blood test detects it early and, when repeated, shows whether a pregnancy is progressing normally.
| Measure | Range |
|---|---|
| Not pregnant | < 5 mIU/mL |
| Possible pregnancy | 5–25 mIU/mL (repeat) |
| Pregnant | > 25 mIU/mL (rises early on) |
A blood test can detect pregnancy about 8–11 days after conception — earlier than most urine tests. Levels roughly double every 48–72 hours in early pregnancy.
It can indicate a very early pregnancy, an early miscarriage, or an ectopic pregnancy. Repeat tests and an ultrasound clarify — sudden pain with a positive test needs urgent care.
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