A patient brought a urine specimen to the clinic for hCG testing.

A patient brought a urine specimen to the clinic for hCG testing. She reported that she has performed a home pregnancy test earlier that day on this same specimen and the results were negative, even though she felt sure that she was pregnant. The technician resulted the specific gravity of the urine and found it to be 1.007. Is the patient pregnant? What advice should be given the patient? Do you believe she had a false negative hCG? Why or why not?