Reproductive Hormone Tests (LH, FSH, AMH)
Blood tests that check hormones involved in periods, ovulation and fertility.
Quick Summary
To investigate irregular periods, PCOS, infertility and menopause.
LH, FSH, oestradiol, AMH, testosterone and others as needed.
Often taken on day 2–5 of the cycle; AMH can be done any day.
Overview
AMH gives an estimate of the remaining egg supply.
In PCOS, LH and testosterone may be raised.
What It Measures
FSH and LH
Signal hormones from the pituitary.
AMH
Ovarian reserve.
Testosterone
Male-type hormone.
How It's Performed
- 01
Preparation
Usually no special preparation. Tell the staff about medicines you take.
- 02
Blood sample
A small amount of blood is taken from a vein in your arm with a thin needle.
- 03
Afterwards
Press on the spot for a minute. A small bruise is common; you can go back to normal activities.
Sources and further reading
Last updated 21 October 2026. For more detail, see these trusted health organisations.
- Follicle-Stimulating Hormone (FSH) Levels Test(opens in a new tab) · MedlinePlus, US National Library of Medicine
- Anti-Müllerian hormone test(opens in a new tab) · MedlinePlus, US National Library of Medicine