Luteinising Hormone (LH) Test

Measures luteinising hormone (LH), part of the signalling pathway controlling ovulation and testosterone production. It is usually interpreted with other hormones and relevant timing rather than alone.

At a glance

• Sample: Blood
• Collection: Self-collected sample using the supplied kit
• Estimated turnaround: 1 day from laboratory receipt of a usable sample

What this test measures

Luteinising hormone (LH)

A pituitary hormone involved in ovulation and testosterone production. The result varies with sex and cycle timing and is interpreted with symptoms and other reproductive hormones.

How clinicians use this test

Clinicians use Luteinising hormone (LH) as part of hormone assessment, often with related hormones and carefully chosen collection timing. One value rarely establishes the cause of symptoms by itself.

Is this the right test for you?

An adult exploring the stated hormone marker with a clinician or monitoring an established plan, with collection timing and medicines taken into account.

Preparation and collection

Return the sample on the same day it is collected. Do not post over weekends or bank holidays.

Understanding your result

The laboratory will report Luteinising hormone (LH) with an assay-specific reference range, threshold or qualitative interpretation. Read the biomarker explanation above for common reasons a result may be high, low, detected or reactive, then use the laboratory comment and clinical context to decide whether repeat or follow-up testing is needed.

Your results and next steps

Review the result with collection timing, medicines and related hormones in mind. Do not start, stop or change prescribed hormone or thyroid treatment from a single home-test result without clinician advice.

Limitations

Hormone values can vary with collection time, age, medicines and biological state. A single result does not establish the cause of symptoms.

When to get medical help

Do not wait for a home-test result if you feel seriously unwell. Call 999 for a life-threatening emergency, or use NHS 111 when you need urgent advice and are unsure what to do.