Luteinizing Hormone (LH) Blood Test

Luteinizing Hormone (LH) is a hormone produced in the brain and is a vital element of fertility. In women it triggers egg release and in men it causes testosterone production. When your LH level is not as expected, it can cause infertility, problems with your menstrual cycle and a low sex drive in men.


Why LH?

Common reasons for this blood test are:

  • To help investigate the potential causes of infertility
  • To get a clear picture of your menstrual cycle, including ovulation date, to aid in conception
  • To help investigate problems with your menstrual cycle
  • To confirm the start of the menopause (or perimenopause)
  • To find the reason for a low sperm count
  • To investigate the cause of a low sex drive in men.

Your blood test

Our phlebotomy-trained professionals will take a blood sample from you. This sample will be analysed in the UK by our authorised partners, TDL. By booking this blood test, you agree for us to share your personal information with TDL in order to process your test. We’ll make sure you consent to this at your appointment too.

Frequently Asked Questions

No, we will send you the results and recommend that you share these with your GP or fertility provider.

It is not unusual for some bleeding to occur under the skin following your blood test and sometimes this can extend a little further around the puncture site.  If this causes you concern, check with your practice nurse. 

Sometimes we cannot get a blood sample from you. This can be for many reasons, such as not being hydrated enough, feeling cold or having another blood test recently. We will always offer you another appointment so we can try again.

Visit our FAQs page for any further questions you may have.