For the test result to be reliable, blood must be taken on an empty stomach in the morning. Before blood sampling, it is advisable not to eat for 12 hours. If blood is donated during the day, it is impossible for 4 hours before the procedure. In the morning, you should not take medicines that cannot be refused for medical reasons. The day before the test, you can not engage in physical activity or sex, take alcohol, smoke, or eat spicy and fatty foods. You can drink only clean water without gas in small quantities. In emergency cases, for example, if a frozen (non-developing pregnancy) is suspected, the gynecologist may prescribe an urgent analysis for hCG. In this case, recommendations regarding food intake lose all meaning. The presence of hCG in the blood is important, not its exact amount.