Ultimate Female Fertility blood test

Female hormones are vital not only for reproductive health but also for overall well-being, influencing energy levels, mood, and metabolism. Oestradiol (E2), the primary form of oestrogen, is produced in the ovaries and plays a central role in the menstrual cycle and fertility. Other key hormones include follicle-stimulating hormone (FSH), luteinising hormone (LH), and progesterone. Together, these hormones help regulate the menstrual cycle and support reproductive function. Testosterone, often thought of as a male hormone, is also important for women. It is used by the body to produce oestrogen and plays a role in maintaining bone and muscle strength, mood, energy levels, and libido. Hormone levels naturally fluctuate throughout the menstrual cycle and shift with age. As women approach perimenopause and menopause, oestrogen and progesterone levels typically decline, while FSH and LH levels increase in response to these changes.

Prolactin is a hormone produced by the pituitary gland that supports reproductive health. It’s best known for its role in stimulating milk production during pregnancy and breastfeeding, when levels naturally rise. Prolactin also influences the menstrual cycle, and elevated levels can affect the balance of other key reproductive hormones, such as follicle stimulating hormone, luteinising hormone, oestrogen and testosterone.

Several hormones are key to fertility, as they help regulate the menstrual cycle and support ovulation. These include follicle stimulating hormone, luteinising hormone and oestradiol to gain further insight into reproductive health, it can also be helpful to test levels of testosterone, progesterone, prolactin, DHEA-S, and AMH. Thyroid hormones also play an important role, as imbalances can affect cycle regularity and ovulation.

Testing female hormone levels is best between days two and five of your menstrual cycle, with day three being ideal. At this stage, levels of luteinising hormone (LH), follicle-stimulating hormone (FSH), and oestradiol are typically at their lowest and most stable. If your periods are irregular, aim to take the test on day three of your next cycle. If that is not possible, or if you do not have periods, you can take the test on any day, but please let us know the date your sample was collected, so we can interpret your results accurately. For the most reliable results, we recommend taking your sample in the morning, as hormone levels can fluctuate throughout the day.

Although often considered a male hormone, testosterone also plays an important role in female health. As women approach menopause, testosterone levels, along with oestrogen tend to decline, which can contribute to symptoms such as low mood, fatigue, and a reduced sex drive. Conversely, elevated testosterone levels in women may be a sign of polycystic ovary syndrome (PCOS), a common condition that can disrupt ovulation and affect fertility.

You can still take the test while using hormonal contraception; however, it may affect certain hormone levels, including LH, FSH, oestradiol, and AMH. For the most accurate results, consider switching to a barrier method (such as condoms) and waiting until your natural cycle resumes before testing. If stopping hormonal contraception isn’t possible, please inform your phlebotomist on the day of your test so this can be noted for the doctor, who will take it into account when interpreting your results.

If you're experiencing symptoms like unexplained changes in weight, energy levels, mood, skin, or hair, your thyroid could be a contributing factor. The thyroid plays a crucial role in regulating your metabolism, body temperature, and energy production, so even slight imbalances can affect how you feel day to day. A thyroid blood test can help determine whether your thyroid is functioning properly by measuring key hormones such as TSH, FT4, and FT3. Identifying an underactive (hypothyroidism) or overactive (hyperthyroidism) thyroid early can make a significant difference in managing your symptoms and improving your overall well-being.

Anti-Müllerian hormone (AMH) is produced in the ovaries, specifically by the small follicles that support egg development. AMH levels reflect the number of active follicles, which naturally decrease with age. This decrease makes AMH a reliable indicator of the number of eggs remaining in the ovaries.

Doctors may request this test to help assess adrenal gland function, investigate symptoms like excessive hair growth, irregular periods, infertility, low libido, or signs of early or delayed puberty.

Oestradiol (E2) is the main form of estrogen, a hormone that plays a key role in reproductive and overall health. It’s produced mainly by the ovaries in women and in smaller amounts by the adrenal glands and testes in men.

Sex Hormone-Binding Globulin (SHBG) is a protein produced in the liver that binds to sex hormones, such as testosterone and oestradiol, and carries them through the bloodstream.