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When are you most fertile?

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Are you planning on having a baby? LetsGetChecked, in partnership with LloydsPharmacy want to help you on your way. It is estimated that 3.5 million people have difficulty conceiving in the UK* so do not feel alone if you are finding it difficult to conceive. Knowledge certainly is power and if you begin to observe your hormonal health, it can help you to take control, not just of your fertility know-how but also of your overall wellness.

LetsGetChecked offer a convenient, confidential at home health testing service that replaces waiting lists and worry with privacy and time-efficiency through at home health testing.

When am I most fertile?


In terms of age, females are biologically able to reproduce from the beginning of their menstrual cycle. The average age at which a girl experiences her first period is 12 years of age, with studies showing that females are most fertile between the ages of 20 and 24.**

In modern society, women generally wait until they are in their late twenties or early thirties to begin having children. By the age of 30, a woman's chance of conceiving is 20% per month. At the age of 40, this chance is reduced to 5%.***

Biologically, females are most fertile during the six day window in which ovulation occurs. For a female with a 28 day cycle, this occurs between day 14 and day 21. Ovulation occurs when the fertilized egg is released from the fallopian tube and travels to the uterus. It is recommended the partners have sex every second day during day 14 and 21 of the menstrual cycle. Sperm can live in the womb for up to six days.


It is widely believed that men remain fertile throughout their lifetime. While they may not experience a male equivalent to the menopause, the quality of their sperm continuously declines from the age of 20 years of age. By the age of 40 the quality of sperm begins to decline more rapidly. Puberty in males can begin at the age of 9 and continue until the age of 16. During puberty, the testes develop and testosterone and sperm production begins. Before the age of 25, it takes an average of 5 months to conceive successfully; it may take up to 5 times longer to conceive successfully after the age of 45.****

The “fertile window” that women experience is not experienced by men in the same way as sperm is continuously produced and stored in the testes throughout their lifetime. It is important however that partners map out intercourse during the fertile window to improve their chances of successful conception.

How do female fertility tests work?

Ovarian reserve test

Anti-Mullerian Hormone (AMH) is a hormone secreted by cells in ovarian follicles. From the moment you are born, the number of eggs in your ovaries are decreasing. That may sound scary, however, it’s a natural part of life.

Your level of Anti-Mullerian Hormone indicates how many eggs you have in your ovaries. The Ovarian Reserve test measures the level of AMH (Anti Mullerian Hormone) in your blood, offering a good indication of your fertility status. This can help indicate your fertility potential, both for the present and the future.

If a woman's AMH levels are below what is normal for her age, this indicates that her chances of becoming pregnant are lower than what is expected for her age. If you are thinking about having IVF, this test can also give you an indication of how you are likely to respond to treatment. You can purchase your Ovarian Reserve Test here.

Female hormone test

This Female Hormone Test is for anyone who is curious about their fertility status. It offers a complete overview of your fertility status. The female hormone must be taken on Day 3 of the menstrual cycle. It is recommended that no hormonal contraceptives are being taken at this time as it may disrupt your results.

What does the female hormone test examine?

  • Follicle Stimulating Hormone

    Follicle Stimulating Hormone is so called because it stimulates the growth of ovarian follicles before the egg is released in the fallopian tube. It controls the menstrual cycle and the production of eggs. It is responsible for pubertal maturation. Levels of follicle stimulating hormone vary throughout a woman’s cycle but they are at their highest when an egg is being released. The test checks your level of follicle stimulating hormone in the blood and by that technology can give you a clearer view of your ovarian reserve.

  • Luteinizing Hormone

    Luteinizing Hormone is responsible for ovulation. It works in conjunction with follicle stimulating hormone to trigger the release of the egg. Elevated levels of luteinizing hormone indicates ovarian failure or polycystic ovarian syndrome.

  • Prolactin

    Prolactin is responsible for the production of breast milk after childbirth. High levels of prolactin in the blood can indicate that you are perimenopausal, experiencing thyroid issues or ovulation is being suppressed.

  • Oestradiol

    Oestradiol is responsible for sexual function and the development of secondary sexual characteristics. It maintains eggs within the ovaries. High levels of oestradiol can suppress follicle stimulating hormone. The Female Hormone Test offers a clear view of your fertility status; find out more about the Female Hormone Test here.

Progesterone ovulation test

Progesterone is a female hormone that prepares the uterus for implantation of a fertilized egg. Following implantation of a fertilized egg, progesterone maintains the womb during pregnancy. The Progesterone-Ovulation test at LetsGetChecked monitors ovulation on Day 21 of your period and can offer you insight into whether you are ovulating healthily. By examining progesterone in the blood, the test can decipher whether you are ovulating. You can purchase the Progesterone Ovulation Test here.

Whether you are simply curious about you fertility or you are hoping to start a family, LetsGetChecked and LloydsPharmacy is here for you every step of the way. The medical team will offer you advice and guidance at the start, during and after your fertility journey.