HCG, Qualitative, Serum

This blood test checks whether a hormone called hCG is present in your blood—a positive result usually means pregnancy, but can sometimes indicate other conditions that your doctor will evaluate further. A negative result means the hormone was not detected at the time of testing, which is normal for people who are not pregnant.

When elevated: A positive qualitative serum hCG result most commonly indicates intrauterine pregnancy but must also prompt consideration of ectopic pregnancy, gestational trophoblastic disease (e.g., hydatidiform mole, choriocarcinoma), or hCG-secreting germ cell tumors. In non-pregnant individuals or those with discordant clinical presentations, a positive result warrants quantitative hCG measurement, serial monitoring, and appropriate imaging. Failure to recognize pathological causes of hCG positivity can delay diagnosis of potentially life-threatening conditions such as ectopic pregnancy or malignancy. When low: A negative qualitative serum hCG result effectively excludes pregnancy when tested at an appropriate time (generally ≥10–14 days post-conception or after a missed period), and is the expected finding in non-pregnant individuals and males without hCG-secreting tumors. In the context of known pregnancy or trophoblastic disease treatment, a negative result may indicate resolution, miscarriage, or successful therapy. Very early pregnancy or testing immediately after implantation may yield a negative result due to hCG levels below the assay detection threshold.

This test is not athlete-specific; it detects pregnancy or certain tumors via a hormone marker. Female athletes may use it to confirm pregnancy and plan training modifications, but it has no direct relevance to performance, recovery, or training load in non-pregnant individuals.