Investigation : FSH
MALE Ref range : 1.5 - 12.4
FEMALE Ref range : 1.7 - 21.5
Turnaround : <48 hours

Please provide the date of the LMP

In accordance with NICE guidance issued in November 2015 (NG23), FSH testing in women > 45 years of age is discouraged in favour of a symptomatic approach to the diagnosis of perimenopause and menopause.

Please consider FSH testing only:
1. In women aged 40-45 years of age with menopausal symptoms including cycle changes

2. In women <40 years of age in whom (premature) menopause is suspected on the basis of menopausal symptoms infrequent or no periods. Increased FSH levels should be repeated after 4-6 weeks; this diagnosis should not be made on the basis of a single FSH result.

Please do not perform FSH testing:

1. In women >45 years of age, irrespective of symptoms.

2. Also in women who are using combined oestradiol/progestogen contraception or high dose progesterone as this makes interpretation of results very challenging.

Click for fertility hormone reference ranges.

Additional information on FSH and its clinical use can be found here: FSH.

New male/female FSH reference intervals 01/05/21, results unaffected.
FSH varies with menstruation: follicular 3.5-12.5, midcycle 4.7-21.5, luteal 1.7-7.7, post-menopausal 25.8-134.8 (U/L)


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