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Luteinising Hormone (LH)

Luteinising Hormone (LH) is a gonadotropin hormone produced by the anterior pituitary gland.  It is vital in the regulation of reproductive organ function.  LH regulates the function of the testes in men and the ovaries in women.

Excess levels of LH can be an indication of infertility.  It can indicate decreased sex steroid production in the testes or ovaries (this is often seen in premature ovarian failure).  LH levels tend to also be increased in patients with Polycycstic ovary syndrome.  An imbalance of LH and Follicle stimulating hormone manifests and cause an inappropriate production of testosterone. 

Low levels of LH can also be an indicator of infertility.  In men, Kallmann’s syndrome is an example where low LH levels are present.  This is associated with a deficiency in gonadotrophin-releasing hormone secretion from the hypothalamus which affects LH levels.

In women, reduced levels of LH means that ovulation will not occur. An example of a condition which can be caused by too little luteinising hormone is amenorrhea.


Specimen Requirements

A blood specimen is required, which can be taken at any time of the day.  Your practitioner may recommend when in your cycle the sample should be collected.  Fasting is not required.


Specimen Collection

Once the practitioner has given the patient their request form, the patient takes it to their nearest Australian Clinical Labs collection centre.  If you are unsure of your nearest collection centre head to location on our website or call us on 1300 554 480 between 9.00am and 5.00pm Monday to Friday for details.


Turnaround Time

Turnaround time is usually 7-10 working days.


Patient Preparation

Patients does not need to fast or make any special preparation before having blood collected.


Test Results

Patient results are delivered via electronic download unless requested otherwise. Results can also be issued via hardcopy, fax or web based e-viewer.


Technical Support

All Australian Clinical Labs Functional Pathology tests are accompanied by an Interpretive Guide to assist practitioners in their clinical understanding and patient management for each result. Australian Clinical Labs Functional Pathology also has experienced full time Technical Advisors available for practitioners to discuss appropriate test selection, interpretation of test results, individual cases and other technical matters. Please call 1300 55 44 80 between the hours of 9:00am and 5:00pm  AEST or email csfp@AustralianClinicalLabs.com.au