Is it necessary to fast before a sex hormone test?
Jan 25, 2025
Source: Cainiu Health
Dr. Zhang Lu
Introduction
The six-item sex hormone test is often required to be performed on an empty stomach because the prolactin component can be easily affected by food intake. Eating before the test may lead to inaccurate results. Fasting ensures accurate test results and also facilitates subsequent tests such as routine blood tests, blood biochemistry, and blood glucose testing. If you have any questions, it is recommended to consult your doctor in advance.
Generally, a sex hormone test refers to a panel of six sex hormone tests. Fasting is usually required for these tests. The detailed explanation is as follows:
The six sex hormone tests mainly include measurements of estrogen, progesterone, testosterone, prolactin, follicle-stimulating hormone (FSH), and luteinizing hormone (LH). Among these, fasting is particularly required for the prolactin test because its results may be affected by food intake. Eating may influence prolactin secretion and lead to inaccurate test results. If abnormal results are found in the six sex hormone tests, additional tests such as a complete blood count (CBC), blood biochemical tests, and blood glucose testing may be needed under a doctor's guidance, all of which also require fasting. Therefore, fasting is generally recommended.
To ensure accurate test results, patients should stop using related medications, such as those containing hormones, before the test. Additionally, adequate rest and maintaining a positive mental state are recommended after the test.
