Understanding AFC and how it is measured will help you provide insight into your reproductive health. The results will tell you what it means for your fertility.
What Is Antral Follicle Count (AFC)?
Although your ovaries have thousands of eggs present since birth, not all of them develop at once. A few small sacs called antral follicles appear on your ovaries every month. Each of these tiny follicles has an immature egg inside, which is visible through a vaginal ultrasound.Your Antral Follicle Count (AFC) is simply the number of these small follicles seen in both ovaries during an ultrasound scan.
The scan is usually done early in your menstrual cycle. These follicles also show your ovarian reserve, the number of eggs that may be released in the coming months.
Why Is AFC Important?
AFC is one of the crucial tests to understand your fertility. Your doctor will likely recommend an AFC scan if you are planning to conceive naturally, undergoing IVF, or freezing your eggs.The following aspects explain the importance of AFC.
- It helps estimate the number of eggs you may be able to produce during fertility treatment.
- It gives insight into your ovarian reserve.
- It helps your doctor suggest the correct dose of fertility medication.
- It allows for better planning of treatment and results.
When Is AFC Measured?
Your AFC is measured within the first few days after your period starts, ideally between Day 2 and Day 5 of your menstrual cycle. Your follicles are small at this time, which allows accurate counting.Your doctor may perform the scan even if you have irregular periods or are in menopause, but the results may vary.
How Is AFC Measured During an Ultrasound?
The following steps will give you a general idea of what to expect during your AFC ultrasound scan.- Preparation: You only need to have an empty bladder during the scan.
- Type of Ultrasound: AFC is measured using a transvaginal ultrasound. This scan uses a thin probe that is inserted gently into your vagina. It provides a clear view of your ovaries and uterus.
- The Procedure: You have to lie down comfortably on the examination table. Your doctor will insert the probe carefully, after which the images of your ovaries will become visible on the screen. The small follicles (2–10 mm in size) are counted on each ovary separately.
- Follicle Size: Only follicles that are between 2 and 10 millimetres are counted. These are the ones considered antral and likely to respond to hormonal signals during your cycle.
What Do Your AFC Numbers Mean?
The results of your AFC test will show only the total number of antral follicles seen across both ovaries. The following numbers will give you a general idea of what they mean.| AFC Count | Interpretation |
| Less than 5 | Low ovarian reserve |
| 6–10 | Below average |
| 10–20 | Normal range |
| More than 20 | High ovarian reserve or PCOS |
Please remember that these numbers are just estimates. A low AFC does not mean you cannot conceive, and a higher count does not mean easier conception. Several other factors, such as egg quality, hormone levels, and your partner’s sperm health, define your ability to conceive.
Can the AFC Change Over Time?
It is natural for the AFC to decline with your age. Most women may experience a gradual drop in their ovarian reserve after the age of 30, and it becomes more noticeable after 35. Also, various other factors, such as lifestyle, genetics, and medical conditions, may further influence your AFC.Your AFC may be lower than average if you have had surgery on your ovaries, chemotherapy, or radiation.
Is There Any Discomfort During the Test?
You may likely feel some discomfort during your AFC scan, but there is no pain. Remember that any discomfort increases with nervousness or stress, so try to relax during the scan. Also, your doctor will guide you through the steps and help you be as comfortable as possible.
Let your doctor know if you are anxious and ask them to take things slowly to help you remain calm throughout the scan.
Your AFC measurement is a simple yet crucial step in your fertility evaluations. Your antral follicle count helps in deciding the next possible steps, whether you are trying to conceive naturally or starting fertility treatments.
Please do not conclude, even if your numbers are outside the normal range. Your doctor can interpret the results better and even guide you through the next steps.
FAQs on How Doctors Count Your Eggs with an Ultrasound
- Can I increase my AFC naturally?
Your age and genetics decide the AFC number, so you cannot naturally increase it. However, a healthy lifestyle, eating nutritious food, and avoiding smoking may support your overall reproductive health. - Is a low AFC the same as infertility?
A low AFC does not check whether you can get pregnant, as it depends on other factors, too. You may find it comforting to know that many women with a low AFC conceive either naturally or with medical treatments. - How often should I get my AFC checked?
Generally, repeated AFC tests are not necessary unless you are undergoing fertility treatment. Your doctor may recommend it for monitoring your ovarian reserve over time, in some cases.
