Skip to main content

Please note that this is a beta version of our website. Should you encounter any bugs, glitches, lack of functionality or other problems on the website, please let us know immediately so we can rectify these accordingly. Your help in this regard is greatly appreciated! You can email us.

Login to North West London Pathology – consumables service

If you need a new account or you have a query about your order, please telephone the pathology call centre on 0203 313 5353.

If you have forgotten your password you can reset this yourself. Please click here if you have forgotten your password.

Results Line and Enquiries

0203 313 5353

Luteinising hormone (LH)

Category Biochemistry
Test background

LH stimulates the conversion of cholesterol to pregnenolone in the gonads and is the rate limiting step in the synthesis of progesterone and androgens. In women, the mid-cycle surge is essential for ovulation. LH is controlled by feedback of gonadal steroid concentrations at the pituitary, and higher levels are found in women after the menopause. In men, LH stimulates the Leydig cells in the testes to produce testosterone.

Clinicial Indications

Suspected infertility (men/women) Fertility treatment in assisted reproductive therapy Investigations of hypopituitarism and hypogonadism Differential diagnosis of primary ovarian insufficiency and menopause

Reference range

LH <20 years - see report Male: 2-12 IU/L Female follicular: 2-10 Female mid-cycle: 20-60 Female luteal: 4-14 Female post-menopause: >20

Sample & container required SST (gold top) or Red top
Sample volume 0.5 mL
Turnaround time 1 day