Pregnenolone
Pregnenolone is a steroid hormone synthesised from cholesterol and serves as the foundational precursor for a wide range of vital hormones, including cortisol, aldosterone, progesterone, oestrogen, testosterone, and dehydroepiandrosterone (DHEA). Often referred to as the ‘mother hormone’, pregnenolone sits at the top of the steroidogenesis pathway and plays a central role in adrenal and gonadal function. Because of its position at the beginning of multiple hormonal cascades, abnormalities in pregnenolone levels can influence stress response, energy regulation, mood stability, cognitive function, reproductive health, and overall endocrine balance. Measuring circulating pregnenolone provides insight into upstream adrenal activity and broader hormonal dynamics.
- Price: £132
- Code: PRN
- TAT: 18 Working Days
- Sample Type: Blood
Clinical Significance
Pregnenolone production primarily occurs in the adrenal glands, with smaller contributions from the ovaries and testes. Altered levels may reflect adrenal dysfunction, chronic stress burden, endocrine disorders, or steroid synthesis pathway abnormalities. In some cases, low pregnenolone may be associated with adrenal insufficiency, chronic fatigue symptoms, or impaired stress adaptation. Conversely, elevated levels may indicate enzymatic blockages further down the steroid pathway or adrenal hyperactivity. This test can be particularly valuable when investigating unexplained hormonal imbalance, menstrual irregularities, low libido, fertility concerns, mood disturbance, or symptoms suggestive of adrenal dysregulation. Because pregnenolone influences downstream cortisol and sex hormone production, it may provide additional clarity when standard hormone panels do not fully explain a patient’s presentation. Assessment may also be relevant in patients undergoing long-term corticosteroid therapy, where endogenous steroid synthesis pathways may be suppressed or altered.
Who Might Benefit From This Test?
This test may be appropriate for individuals experiencing persistent fatigue, stress intolerance, hormonal imbalance, irregular menstrual cycles, perimenopausal symptoms, low libido, or unexplained mood changes. It may also be requested as part of a comprehensive adrenal or endocrine evaluation in patients with suspected steroidogenesis disorders. Clinicians may include pregnenolone measurement within a broader hormonal panel that assesses cortisol, DHEA, progesterone, testosterone, and oestrogen levels to obtain a more complete picture of endocrine function.
Sample Collection
A blood sample is collected by a trained healthcare professional in a clinical environment. The procedure is quick and minimally invasive, typically completed within minutes. Samples are analysed in specialist laboratories to ensure accurate quantification of pregnenolone levels.
Understanding Your Results
Results are interpreted within the context of your clinical symptoms and other hormone markers. Because pregnenolone sits at the beginning of multiple hormonal pathways, interpretation requires careful consideration of downstream hormones and overall endocrine balance. Abnormal findings may prompt further hormonal evaluation, lifestyle and stress management strategies, or referral to an endocrinologist for specialist assessment. Results are not assessed in isolation but as part of a comprehensive clinical picture.
FAQs
When will I receive my results?
Results are usually available within the stated turnaround time.
Should I discuss my results with a doctor?
Yes, results should always be reviewed with a qualified healthcare professional.
Why Choose Marylebone Diagnostic Centre?
Marylebone Diagnostic Centre offers comprehensive endocrine and hormonal testing within a professional and discreet setting. Our experienced clinical team ensures meticulous sample handling and analysis through accredited laboratories. With a turnaround time of 18 days, this test provides detailed insight into adrenal and hormonal function, supporting personalised treatment planning and proactive health management.
Book Now
Book the Pregnenolone (PRN) test today to gain deeper insight into your hormonal balance and adrenal health.
