False positives are extremely rare

Beta hcg and pregnancy dating

It is not necessarily the level that matters, but rather the change in the level. Test results can also be influenced by the presence of germ cell tumors. The level will reach its peak in the first weeks of pregnancy and then will decline and level off for the remainder of the pregnancy. If you get a positive test result, you are most likely pregnant.

Food and Drug Administration

Food and Drug Administration. No test is percent accurate every time. These include fertility drugs such as Profasi, Pregnyl, and Pergonal. However, there are some conditions that may cause a false positive, such as certain types of cancer and early miscarriage. Some antibodies may also interfere with test results.

No test is percent

Your doctor will help you interpret the results. It is made by cells formed in the placenta, which nourishes the egg after it has been fertilized and becomes attached to the uterine wall. False positives are extremely rare.