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London Medical Laboratory

London Medical Laboratory Progesterone - Day 21 Ovulation

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Check your progesterone levels which can confirm whether you have ovulated or not.

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Why you need it:

  • This home test is essential for confirming whether ovulation has occurred. Monitoring progesterone levels provides insight into the success of ovulation, as a significant spike in progesterone typically happens in the latter half of the menstrual cycle.
  • Understanding your progesterone levels is crucial for fertility tracking. Successful ovulation is a key factor in conception, and this test helps individuals and couples in their fertility journey by providing valuable information about ovulatory patterns.
  • The test should be taken around day 21 of the menstrual cycle, offering specific guidance on when to measure progesterone levels. This timing aligns with the expected peak in progesterone after ovulation, ensuring accurate results for individuals trying to conceive.

Why we love it:

  • We appreciate the test's specific focus on progesterone levels to determine ovulation. This targeted approach provides clear and actionable insights, making it a valuable tool for individuals who want to understand their ovulatory status.
  • The convenience of conducting this test at home adds to its appeal. It eliminates the need for frequent clinic visits, allowing individuals to track their fertility journey discreetly and comfortably.
  • By emphasising the role of progesterone in confirming ovulation, the test empowers individuals with knowledge about their reproductive health. This knowledge can be instrumental in making informed decisions related to family planning and fertility.

What is it (and why):

  • This home test specifically checks progesterone levels to determine whether ovulation has occurred. Progesterone, a hormone crucial for the maintenance of pregnancy, exhibits a noticeable increase in the latter part of the menstrual cycle after ovulation.
  • The test serves as a tool to confirm successful ovulation, providing individuals with valuable information about their reproductive cycle.
  • The test is designed to be taken around day 21 of the menstrual cycle, aligning with the expected peak in progesterone levels. This specific timing enhances the accuracy of results and ensures that individuals receive information at a point in their cycle crucial for fertility tracking.
how to use


Whether you use a home test or have your sample taken with one of our trained phlebotomists, our blood tests are quick and easy to use.

Take the test

At home, or in one of our testing locations.

Send us your sample

We provide pre-paid postage for our at home tests.

Receive your results

We provide a secure link to your doctor validated personal results.



Your test kit contains easy to follow instructions on how to take your own finger blood sample.

London Medical Laboratory Progesterone - Day 21 Ovulation
London Medical Laboratory Progesterone - Day 21 Ovulation
London Medical Laboratory Progesterone - Day 21 Ovulation
  • At-home sampling

  • Can confirm ovulation

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Frequently asked

Do I have to fast for my test?

If you are having cholesterol tests as part of your profile you may want to fast for 8 hours prior to your test - particularly if you have had a previous high level. It is not essential though, as your results will still give useful health information whether you have fasted or not. Fasting entails not eating or drinking anything except for water.
You do not need to fast for all other tests.

Do I need to prepare for my test in any way?

If you take blood thinning medication please tell the phlebotomist before your test.
Please drink water and keep hydrated before your appointment.

How do I finger prick sample myself?

Your test kit contains easy to follow instructions on how to take your own finger blood sample.

When will I get my results?

You will receive your results on the day after London Medical Laboratory receive your sample in their laboratory. They run a 24/7 laboratory operation and test all samples as quickly as possible after receiving them which enables their team of in-house GPs to review and communicate your results in the fastest possible time frame. If you need your results urgently they would recommend booking an in-store appointment or a mobile phlebotomist as this will guarantee your sample reaches the laboratory that same day. For the return of postal kits they use the Royal Mail 1st Class Tracked service which normally delivers on the next working day (Monday-Friday) however as with any postal service there is the possibility of delays. In the unlikely event that your sample requires retesting, this may delay the delivery of your result.

About London Medical Laboratory


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