Limitations

• If a urine specimen is too dilute (i.e. low specific gravity) it may not contain representative levels of hCG and will produce a false negative result.  If pregnancy is still suspected, the first morning urine should be obtained 48–72 hours and the urine pregnancy test repeated or a quantitative serum hCG is sent to the clinical lab
• While pregnancy is the most likely reason for the presence of hCG in urine, other conditions may be associated with detectable hCG, i.e., ectopic pregnancy, molar pregnancy or patients with trophoblastic and non-trophoblastic disease. Early pregnancy associated with low levels of hCG may not be detected with this kit. If pregnancy is suspected, consider ordering a serum quantitative hCG or re-collect in 48 hours. hCG may remain detectable a few days to several weeks after delivery, abortion, natural termination or hCG injections