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Day 3 Fertility Blood Test

Original price £0.00 - Original price £0.00
Original price £0.00
£48.00 - £48.00
Current price £48.00

This tests for 3 key hormones: follicle stimulating hormone (FSH), luteinising hormone (LH), and oestrogen (oestradiol) - and is taken between day 2-4 of your cycle to provide a "baseline" reading of your hormone levels to provide an indication of your ovarian reserve.

  • Biomarkers: 3
  • Turnaround: 1-2 days

Simple and accurate blood test from a laboratory you can speak to.

Step 1. Choose sample collection option

Currently selected option: HOME KIT via Royal Mail Tracked 24

  • Available everywhere in mainland UK.
  • Includes everything you need to take a safe and suitable blood sample in about 15 minutes.
  • Post the sample back to our laboratory via Royal Mail Tracked 24.

Re-test guarantee

About the test

The day 3 fertility blood test can actually be taken at any point between days 2 and 4 of your cycle (where day 1 is the first day of your period).

In this test we test for 3 key hormones: follicle stimulating hormone (FSH), luteinising hormone (LH), and oestrogen (oestradiol). We test at this time in the cycle because this gives us a "baseline" reading of your hormone levels which gives us an indication of your ovarian reserve. At this time in the cycle both FSH and oestrogen should be low.

High levels of FSH in particular suggest there may be a problem with ovarian reserve. LH is also usually low at this point in the cycle, high or low levels may suggest irregular ovulation patterns.

There are a wide range of medical conditions and nutritional deficiencies that may reduce your chance of conceiving naturally, or may impact on the outcome of you pregnancy. Furthermore, pregnancy and childbirth put enormous stresses on the female body and so it is helpful to ensure that you are in optimum health not just to conceive, but so that you and your baby remain healthy through the pregnancy.

With our free Health Dashboard tool online, you can track your biomarkers over time and compare your results with previous ones. This feature provides a clear understanding of how your health is progressing and helps you make better-informed decisions about your well-being and any improvement on the fertility biomarkers.

Take the first step towards controlling your future children`s wellbeing and book a test for female preconception and fertility function today.

9 Biomarkers


    - Follicle Stimulating Hormone
    - Luteinizing Hormone
    - Oestradiol/Estrogen/E2


    Need more biomarkers? You can add other biomarkers to the shopping basket together with this panel. Frequently added: Ultimate Female Fertility Blood Test


    For most biomarkers our usual turnaround time is 24-48 hours, or less, from the time your sample is in our lab. We do not wait for all the results to complete before sending them to you, so you may start receiving results the same day for most cases, or as results become available.

    We are extremely proud of our very short turnaround times and a very efficient laboratory processes. Whilst we accommodate the shortest of time scales, with some results available within hours, for this particular test the usual turnaround time is:

    1-2 days

Doctor's notes

Hi, I am Dr. Adam Staten and here's my view on this test as a GP and Clinical Director at One Day Tests.

Elevated levels of follicle-stimulating hormone (FSH) are indicative of potential issues with a woman's ovarian reserve. FSH is a hormone released by the pituitary gland in response to low estrogen levels, signaling the ovaries to produce more eggs. High FSH levels typically suggest that the ovaries are not responding adequately to the hormone, which may be due to a reduced number of remaining follicles or decreased egg quality. This can be a concern for women trying to conceive, as it may make it more challenging to become pregnant.

Monitoring FSH levels through blood tests can help diagnose fertility issues and guide appropriate treatment options.

Red flag symptoms for the Day 3 Fertility Blood Test

Even if your blood tests are normal, you should see a doctor if you have any of the symptoms below because they may be a sign of serious underlying illness. 

  • Unexplained weight loss.
  • Drenching sweats during the night.
  • Persistent fevers.
  • Progressively severe symptoms of any kind.

Your Results and Health Dashboard

The results of your Day 3 Fertility Blood Test will be emailed to you as a secured PDF file, ready for your GP and will also be uploaded to our Health Dashboard area of the website. It’s a unique and powerful tool, powered by our in-house clinical analysis research, to match your biomarkers across test panels and symptoms, as well as provide clinical commentary on all individual biomarkers you tested for.

The health dashboard will also provide "panel level" commentary - a birds eye view of the biomarkers that were tested. This feature allows you to view your test results and clinical commentary, and compare them to previous results, giving you a clear understanding of how your health is progressing.

By using the Health Dashboard, you can identify changes in your biomarkers and make necessary adjustments to your lifestyle. This added value is immense, as it empowers you to monitor your health and make informed decisions about your well-being.

It's free and is available with all of our tests.

Save on continuous monitoring with our subscription plan

The best way to look after your health is to do so regularly. This is easy to do with our continual monitoring plans which give you a discount on future blood tests. You choose the frequency and we'll do the rest.

When you purchase a subscription, we will deliver your home test kits or allow you to book appointments in line with your chosen frequency. You will be able to track your biomarkers over time in our powerful Health Dashboard, where results will be automatically updated for you. There is a minimum of 3 tests with any subscription, after which you can pause/restart/cancel at any time.

Special instructions

Hi, I am Stefania Brown, I am the Laboratory Manager at One Day Tests and here are the lab's special requests for the Day 3 Fertility Blood Test.

This test should be taken as close to 9am as possible, between day 2 to 5 of your cycle, where day 1 is the first day of your period.

You should take this test after any symptoms of a short term illness have settled.

Venepuncture appointment - how to prepare

If you are coming into one of our clinics for the test, this is what you need to do before you arrive:

  • Drink plenty of water about an hour before the appointment.
  • Avoid coffee/tea/energy drinks. Water is good!
  • That’s it! We’ll do the rest.

Home test kit for Day 3 Fertility Blood Test - how it works

Our blood test kits are simple and convenient.

The most important step in doing a blood test at home is to read the instructions very carefully. The process is very simple, but there are a few pitfalls you need to be aware of - you will save yourself a lot of time if you do it right the first time around!

  • Full printed instructions will arrive with your kit - please read them carefully.
  • Drink plenty before taking the sample and warm your hands up in the sink with warm water for a few minutes. This will make your blood flow much better.
  • Fill the tubes to the top line. We don’t need much blood; filling tubes to the top line is about 15 drops of blood.
  • Post the samples on the same day you take them, before midday, Monday to Thursday. If you post it any other time it might get to us late or be stuck at a sorting office over the weekend. You will then have to do it again.
  • Package the sample in the same box the kit came in. Otherwise, Royal Mail or DPD will reject it. The sample tubes go into a pouch, then into a cardboard box, and then into a return envelope. All of this is provided in the kit: please use it.

We look forward to receiving your sample in our lab!

How the finger prick home test kit for Day 3 Fertility Blood Test works - from Dr. Adam Staten

Why choose us?

Hello! My name is Dr. Vinesh Mistry, I am part of the GP team here at One Day Tests and here is why you should trust us to test your blood.

We run our own regulated laboratories and our own accredited clinics. We manufacture our own approved home sample collection kits. Your results are looked after by our fantastic clinical governance team and our super-talented biomedical science team.

When you book your test with us - you book directly with the lab. This means accuracy and responsible duty of care, direct access to the provider and extremely fast turnaround times.

Finally, our customer services rock! You can ask the lab a question any time or you can speak to a real human. It's good to WhatsApp, email on or give us a call on 0845 527 07 67.

Frequently Asked Questions

Hi, I am Lana Nela, Lead Nurse, and here is what we are frequently asked about this test.

What can affect fertility?

Chronic conditions like polycystic ovary syndrome (PCOS), endometriosis, thyroid disorders, and diabetes can impact fertility. Assessment and management of these conditions are essential.

What else can influence fertility?

Lifestyle factors, including body mass index (BMI), smoking, alcohol consumption, and stress levels, can influence fertility.

Why do you test the hormones?

Monitoring hormone levels, including follicle-stimulating hormone (FSH), luteinizing hormone (LH), estradiol, and anti-Müllerian hormone (AMH), can help assess ovarian reserve and the overall hormonal environment for fertility.

Why take this test?

Hi, I am Dr. Marco Esposito and here is why it's important to take this test.
  • To see if there is anything amiss that may be preventing you and your partner conceiving.
  • If you have a family history of difficult conceptions and would like to check that all is well.
  • To monitor your vital biomarkers over time.

Is this test right for you?

Hi, I am Sandeep Patel, I am the Laboratory Director at One Day Tests. Here are the symptoms that you may wish to address with this test.

Planning a family is one of the most important stages in anyone`s life, and if this is the step you are planning on taking - we are here to help. A comprehensive health check geared towards fertility and preconception, just to make sure that all is well.

If you are already trying for a baby - this panel will help identify any potential problems and help guide you towards a potential solution, if your biochemistry is at play.


    Fertility problems and Women

Why blood tests are important.