A pregnancy test, commonly known as an hCG test, measures the presence of human chorionic gonadotropin (hCG), a hormone produced by the placenta shortly after a fertilized egg attaches to the uterus. This hormone can be detected in both blood and urine, making it possible to confirm pregnancy as early as 10 days after conception. The test is most accurate when taken one to two weeks after a missed menstrual period. There are two main types of hCG tests: qualitative and quantitative. Qualitative tests provide a simple positive or negative result, indicating whether hCG is present. In contrast, quantitative tests measure the exact level of hCG in the blood, which can help assess the age of the fetus and monitor the health of the pregnancy. Pregnancy tests are not only used to confirm pregnancy but also to identify potential complications, such as ectopic pregnancies or gestational trophoblastic disease. Symptoms like abnormal bleeding or severe abdominal pain may prompt a healthcare provider to recommend testing. If the test result is positive, it is crucial to follow up with a healthcare professional for further evaluation and to discuss prenatal care options. Conversely, a negative result may require retesting if pregnancy is still suspected, as low hCG levels can lead to false negatives. Overall, hCG testing is a vital tool in reproductive health, providing essential information for expectant mothers.