What is Follicle – Stimulating Hormone? (FSH)

April 30, 2016

In women FSH stimulates the growth and development of ovarian follicles (unfertilised eggs) during the follicular phase of the menstrual cycle.

A women’s cycle is divided into two phases, the follicular and the luteal, by a mid cycle surge of FSH and luteinising hormone (LH)


FSH levels are useful in the investigation of menstrual irregularities, meaning irregular periods and to aid in the diagnosis of pituitary gland disorders.


In children FSH and LH are also used to diagnose delayed or precocious early puberty and investigate problems with growth.


FSH and LH are normally requested by men or women whom are investigating their own infertility journey; however FSH is also used to see if women have reached the menopause.


In women FSH and LH levels can help tell the difference between primary ovarian failure and secondary ovarian failure.


When us ladies enter the menopause, our ovaries stop working, our FSH levels will rise, this is a normal process. The average age in the UK of onset estimated at 51 years of age, however the normal age range is wide, but rare to be affecting younger women than 40 years old!


Preparation for your blood test, (carried out in the comfort of your own home), for ladies needing the blood test for infertility, this test needs to be taken in the first 4 days of your cycle, if your periods are regular.

If the blood test is for the menopause, your periods are stopping, then the FSH can be done anytime at a convenient time and date you choose!

It is also very important that the above blood tests cannot be carried out, if you are taking any female hormones, e.g. contraception’s such as combined oestrogen and progestogen or a high dose of the pill, as these will affect your blood test results.


To book your blood tests at the fantastic price of only £40.00 in the comfort of your own home, on a time and date you choose, with your test results given back to you, and you only within 24 hours, please telephone or email bloods4you today!

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