What Lab Tests Are Needed Before Starting Bioidentical Hormone Therapy?
Dr. James D. Fontaine
3/15/2026
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Are you considering bioidentical hormone replacement therapy, but not sure what tests you'll need first? Lab tests are essential for identifying hormone imbalances and determining the right treatment plan.
At Fontaine MD Aesthetics and Anti-Aging Medicine in San Diego, CA, Dr. James D. Fontaine uses comprehensive testing to create personalized plans. If you're experiencing menopause symptoms or want to book a testosterone test, call today for a consultation.
Symptoms of a hormonal imbalance
Hormone imbalances commonly occur in women over 40, though they can also affect younger women who've had a hysterectomy. Common symptoms include fatigue, decreased sex drive, trouble sleeping, weight gain, mood changes, and mental fog.
For men, these imbalances can lead to erectile dysfunction, loss of muscle mass, fatigue, and decreased libido. Addressing these changes with bioidentical hormones can help restore your health and quality of life.
What are bioidentical hormones?
So, what are bioidentical hormones? These hormones are structurally identical to the hormones your body naturally produces. They're used to address hormonal imbalances and restore levels to their optimal state.
By stabilizing hormones, bioidentical hormone replacement therapy (BHRT) can improve mood, sexual performance, energy, sleep, mental focus, and more.
Why lab testing is important before and after BHRT
Before starting hormone treatment, comprehensive lab testing is essential to identify which hormones are out of balance and by how much. This allows Dr. Fontaine to create a custom treatment plan.
For example, a testosterone test may be ordered to check testosterone levels in men, as low testosterone can cause fatigue, decreased sex drive, and mood changes. Testing for low estrogen is also common in women, especially for women experiencing early menopausal symptoms.
Follow-up testing is also done after a few months of starting hormone treatment to monitor your progress and make adjustments as needed. This ensures your hormone levels stay consistent and your symptoms continue to improve.
How BHRT treatment works
Once your lab results are reviewed in San Diego, CA, Dr. Fontaine can address your specific symptoms through treatment. BHRT may involve hormone pellets, creams, patches, or other methods based on your preferences and needs.
The goal of BHRT is to help you feel like yourself again, whether you're dealing with low estrogen, low testosterone, or other hormone imbalance issues. And as mentioned, regular monitoring and adjustments ensure the process continues to work effectively over time.
Results you can expect from BHRT
Many patients notice improvements in energy levels, mood, sexual desire, and mental clarity within a few weeks to months of starting bioidentical hormone replacement therapy.
Long-term benefits include enhanced sexual performance, better sleep, improved weight management, and sharper mental focus. By restoring your hormone levels, treatment helps you regain vitality and well-being.
Results vary depending on your specific situation, but with proper testing, including a testosterone test and personalized treatment, most patients experience noticeable improvements.
Get tested and start feeling better
So, what are bioidentical hormones, and how does hormone therapy work? If you have questions or are experiencing fatigue, low sex drive, or other signs of hormone imbalance, Fontaine MD Aesthetics and Anti-Aging Medicine in San Diego, CA, is here to help. Dr. James D. Fontaine specializes in treatment for low estrogen, low testosterone, and other issues. Call today and see how bioidentical hormones can help you feel better.
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