Antral Follicle Count and Ovarian Reserve: What Women Should Know
When discussing female fertility, follicles are an important part of the picture. They contain the developing eggs within the ovaries, and the number of follicles visible at the beginning of a menstrual cycle can provide useful information about a woman’s ovarian reserve and potential response to fertility treatment.
One of the most commonly used measurements is the antral follicle count (AFC).
How Can You Check Your Follicle Count?
1. Ultrasound Examination
Ultrasound is one of the most widely used methods for assessing antral follicles. It allows a clinician to examine the ovaries and count the small follicles that are visible at the beginning of the menstrual cycle.
When is it measured?
AFC is generally assessed during the early follicular phase, commonly around days 2–5 of the menstrual cycle, when the ovaries are relatively inactive and the small antral follicles can be evaluated more consistently.
During fertility monitoring later in the cycle, ultrasound may also be used to follow the growth of a dominant follicle. A mature pre-ovulatory follicle is typically around 18–25 mm in diameter, although this can vary between individuals.
Understanding Follicle Development
Follicles progress through several stages as they develop:
- Primordial follicles: the earliest stage of follicular development. These microscopic follicles represent the underlying ovarian reserve but cannot be seen on a standard ultrasound.
- Primary follicles: a later stage of early development, but still too small to be detected by routine ultrasound.
- Secondary follicles: continue to develop but generally remain below the resolution of routine ultrasound.
- Antral follicles: follicles that have developed a fluid-filled cavity and can eventually become visible on ultrasound.
Importantly, the follicles counted during an AFC are antral follicles, rather than the much larger pool of microscopic primordial follicles stored within the ovaries.
2. Blood Hormone Tests
Blood tests can provide additional information about ovarian reserve and reproductive function.
Common tests include:
AMH (Anti-Müllerian Hormone)
AMH is produced by cells surrounding developing follicles and is widely used as a marker of ovarian reserve.
FSH (Follicle-Stimulating Hormone)
FSH is commonly measured during the early part of the menstrual cycle. Higher baseline FSH levels may be associated with reduced ovarian reserve.
Estradiol (E2)
Estradiol is sometimes assessed alongside FSH because an elevated early-cycle estradiol level can affect the interpretation of FSH results.
No single test provides a complete assessment of fertility. AFC, AMH, age, menstrual history and other clinical factors are usually considered together.
How Many Antral Follicles Are Normal?
There is no single AFC that is considered “normal” for every woman.
Antral follicle numbers generally decrease with age as the ovarian reserve naturally declines. Younger women therefore tend to have higher AFCs than women approaching their 40s.
Some reference data have reported approximate AFC ranges such as:
|
Age |
Average AFC |
Reported Range |
|
25–34 years |
15 |
3–30 |
|
35–40 years |
9 |
1–25 |
|
41–46 years |
4 |
1–17 |
An AFC of approximately 3–6 follicles may be considered low in some clinical settings and can indicate diminished ovarian reserve. However, interpretation varies according to age, ultrasound technique and the fertility clinic’s reference ranges.
Most importantly, a low AFC does not automatically mean that pregnancy is impossible, nor does it directly measure egg quality.
When Should You Consider Ovarian Reserve Testing?
Women aged 35 or over who have been trying to conceive for around six months without success are generally advised to seek fertility assessment rather than waiting for a full year.
Assessment may include:
- Antral follicle count (AFC)
- Anti-Müllerian hormone (AMH)
- Early-cycle FSH
- Estradiol (E2)
- Other reproductive hormones where clinically appropriate
Additional investigations may be recommended depending on medical history, menstrual cycles and previous fertility treatment.
What If Your Antral Follicle Count Is Low?
A low AFC can understandably be worrying, but it is important to understand what the result actually means.
A lower number of antral follicles generally suggests a reduced ovarian reserve and may predict a lower response to ovarian stimulation during IVF.
However, follicle quantity and egg quality are not the same thing. Egg quality is strongly influenced by age, while ovarian reserve tests primarily provide information about the remaining follicle pool and likely response to stimulation.
Women with a low AFC can still ovulate naturally, conceive and have successful fertility treatment. The result should therefore be interpreted alongside age, AMH, hormone levels and the overall clinical picture.
Why Is Shawkea Dandelion T-1 Being Studied in Fertility Support?
For women experiencing age-related changes in ovarian reserve or undergoing fertility treatment, nutritional and complementary approaches may sometimes be considered alongside conventional medical care.
Shawkea Dandelion T-1 has attracted interest because of research investigating its potential effects on ovarian and reproductive function.
1. A Specific Bioactive Compound
Shawkea T-1 is described as a specific amino-sugar-related bioactive substance rather than a conventional dandelion extract.
Research has investigated its potential interaction with pathways involved in reproductive endocrine function, including processes associated with the hypothalamic-pituitary-ovarian (HPO) axis.
2. Research Into Ovarian Response and Granulosa Cells
Laboratory and clinical research has explored several potential mechanisms.
FSH Receptor Activity
Studies have investigated whether T-1 may influence the expression or activity of follicle-stimulating hormone receptors (FSHR) on ovarian granulosa cells.
FSH receptors play an important role in follicular development and ovarian response to FSH stimulation.
Granulosa Cell Function
Granulosa cells surround the developing oocyte and provide essential metabolic and hormonal support.
Experimental research has examined whether T-1 may influence granulosa-cell proliferation and apoptosis, potentially affecting the environment in which follicles develop.
Reproductive Hormones
Small clinical studies have also investigated changes in reproductive hormones including estradiol and progesterone following supplementation.
These findings are of research interest, although they should not be interpreted as evidence that a supplement can restore ovarian reserve or reverse reproductive ageing.
3. Clinical Research in IVF Patients
Research has also examined T-1 supplementation in women undergoing assisted reproductive treatment.
An eight-year retrospective study involving 1,014 Chinese IVF patients reported higher blastocyst formation and live-birth rates among women who received the intervention compared with the control group.
Reported blastocyst rates were 75.98% versus 57.28%, while reported live-birth rates were 57.53% versus 40.00%.
Research from Hanabusa Women’s Clinic in Japan has also reported a higher day-5 blastocyst development rate in the supplementation group (29.5%) compared with controls (22.1%).
These findings are promising, but they should be interpreted carefully. In particular, retrospective and observational studies cannot establish cause and effect in the same way as large, well-designed randomised controlled trials.
Further high-quality research is therefore needed to determine the magnitude of any potential benefit and which groups of patients may be most likely to benefit.
Supporting Fertility After 35
For women over 35, understanding ovarian reserve can be particularly valuable when planning pregnancy.
AFC and AMH can provide useful information about the remaining follicle pool and likely ovarian response, but neither test can independently predict whether an individual woman will become pregnant.
If your AFC or AMH is lower than expected, the most important step is to discuss the results with a fertility specialist rather than relying on a single number.
Lifestyle and nutritional support may form part of an overall fertility plan, but supplements—including Shawkea Dandelion T-1—should be considered supportive rather than a replacement for fertility assessment or evidence-based medical treatment.
Ultimately, fertility is influenced by many factors, including age, ovarian reserve, egg and sperm quality, reproductive anatomy and overall health. Understanding your AFC and other ovarian reserve markers can help you make more informed decisions and seek appropriate support at the right time.
This article is for general educational purposes and does not constitute medical advice. Anyone experiencing fertility difficulties or considering supplements alongside fertility treatment should discuss their individual circumstances with an appropriately qualified healthcare professional.