Why test thyroid and reproductive hormones together?

An underactive or overactive thyroid can cause problems with ovulation and periods, and symptoms such as tiredness can come from either. Testing both gives your doctor a fuller picture.

Can this test show PCOS?

It can show raised testosterone or a high free androgen index, which are features doctors look for. PCOS is diagnosed by a doctor using your symptoms, blood tests and sometimes an ultrasound scan, so a blood test alone cannot confirm it.

Is this hormone test suitable for men?

Yes. Men can use it to check testosterone, LH, FSH, prolactin and thyroid function. To look for low testosterone, UK guidance recommends a sample taken before 11am, and a low result should be repeated.

Endocrinology Blood Test at Jace Medical

Hormones & fertility

Private blood test

Endocrinology Blood Test

Thyroid and reproductive hormones together, or Endocrinology Plus adding AMH, cortisol, DHEA and blood sugar markers.

13 biomarkers
No fasting needed

Choose your panel

Endocrinology13 biomarkers£109Endocrinology Plus18 biomarkers£269

Endocrinology

£109Includes sample collection

Book this test Ask a question

We confirm your appointment and any preparation, such as fasting, before you attend.

What’s included

13 biomarkers in Endocrinology.

No fasting needed

Thyroid5

How well your thyroid is working, and antibodies linked to thyroid conditions.

Anti-Thyroglobulin Antibody (Anti-Tg)
Anti-Thyroid Peroxidase Antibody (Anti-TPO)
Free Thyroxine (FT4)
Free Tri-iodothyronine (FT3)
Thyroid Stimulating Hormone (TSH)

Hormones & fertility8

Reproductive, stress and adrenal hormones.

Follicle Stimulating Hormone
Free Androgen Index
Luteinising Hormone
Oestradiol
Progesterone
Prolactin
Sex Hormone Binding Globulin (SHBG)
Testosterone

About this test

Is the Endocrinology Blood Test right for you?

Who it’s for

You have symptoms that could come from your thyroid or your reproductive hormones, such as tiredness, weight change, irregular periods or low sex drive, and want both checked together.
You have irregular periods or symptoms that can be linked to PCOS, and want your hormones and thyroid checked at the same time.
Thyroid disease runs in your family and you also want a picture of your reproductive hormones.
You want a broader hormone review, including your ovarian reserve (AMH), adrenal hormones and blood sugar, which Endocrinology Plus adds.

What it can show

TSH, free T4 and free T3 show how well your thyroid is working. Thyroid antibodies (anti-TPO and anti-thyroglobulin) can show whether the immune system is affecting it.
FSH, LH, oestradiol and progesterone show how the pituitary gland and the ovaries or testes are working. Prolactin can point to a pituitary cause of irregular periods or low sex drive.
Testosterone, SHBG and the free androgen index estimate active male hormones. In women raised levels can be a feature of PCOS, and in men low levels can suggest low testosterone.
Endocrinology Plus adds AMH (a marker of the egg reserve in the ovaries), cortisol and DHEAs (hormones from the adrenal glands), and insulin and HbA1c. HbA1c reflects your average blood sugar over the last 2 to 3 months.

What it can’t tell you

Illness, pregnancy, hormonal contraception, HRT and other medicines can change thyroid and reproductive hormone results.
Female hormones change through the menstrual cycle, so results are interpreted against the day of your cycle the sample was taken.
Cortisol follows a daily pattern and rises with stress and illness, so a single result may need repeating.
AMH does not predict your chance of getting pregnant naturally. It is mainly used when planning fertility treatment.
Results need to be interpreted alongside your symptoms. Diagnosis and treatment of hormone and thyroid conditions are with your GP or specialist.

Before your test

You do not need to fast for either option. Eat and drink as normal unless another test you are having needs fasting.
Book a morning appointment, as testosterone is highest in the morning. For Endocrinology Plus, book between 8am and 9am if you can, as this is when cortisol is usually measured.
If you have regular periods, book for day 1 to 4 of your cycle (day 1 is the first day of bleeding), and tell us the date of your last period and any hormonal contraception or HRT you use.
Biotin (vitamin B7), found in many hair, skin and nail supplements, can make testosterone and SHBG results inaccurate. If you take a high dose (5mg or more a day), stop it for 1 week before your test if it is safe to do so, and tell us if you take any biotin.

Your results

Usually within a couple of working days. We email your results once a doctor has reviewed them.

How it works

From booking to results in three steps.

Step 1
Request your test
Send a booking request online or call us. We confirm your clinic, appointment time and any preparation.
Step 2
Visit the clinic
A short appointment for professional sample collection at Greysteel or Letterkenny. No GP referral needed.
Step 3
Receive your results
Usually within a couple of working days, emailed to you once a doctor has reviewed them.

Common questions

Questions about this test.

Endocrinology checks your thyroid and reproductive hormones. Endocrinology Plus adds AMH, the adrenal hormones cortisol and DHEAs, and the blood sugar markers insulin and HbA1c.