The search results indicate that a pregnancy test is a medical test that checks for the presence of a hormone called human chorionic gonadotropin (HCG) in a persons urine or blood. HCG is produced by the body during pregnancy and appears in the blood and urine of pregnant individuals. There are two types of pregnancy tests: qualitative and quantitative. Qualitative tests give a positive or negative result depending on the presence or absence of HCG in the sample, while quantitative tests measure the amount of HCG in the sample. Qualitative tests can be done using either a blood or urine sample and are done most often to confirm a pregnancy.