Human chorionic gonadotropin is an hormone which is secreted in higher quantities during pregnancy. Its levels below 5 means no pregnancy. If levels of beta HCG are between 5-25, it means may or may not pregnant. Repeat test is recommended after 2 days. Because HCG levels continue to double after every 72 hours. HCG levels more than 25 mean positive pregnancy. A low positive beta HCG means you may or may not pregnant.