Many women trying to conceive (TTC) are unsure if their follicle size is normal. This tool provides a real-time assessment of follicle development when you enter ultrasound-measured diameter values (in millimeters). Follicle diameter refers to the maximum outer diameter of the follicular cavity on an ultrasound image. Based on medical standards, the tool categorizes the diameter into three ranges: 18-25mm is the optimal range for conception, less than 18mm indicates underdevelopment, and greater than 25mm suggests a risk of luteinization.
What is the unit for follicle diameter?
Millimeters (mm). Simply enter the numbers without adding the unit.
What is the medical basis for the different badge colors?
Green (18-25mm): Mature follicle, optimal time for conception; Yellow (>25mm): Risk of Luteinized Unruptured Follicle (LUF) syndrome; Red (<18mm): Underdeveloped, requires continuous monitoring.
The assessment results provided by this tool are for reference only and cannot replace professional medical diagnosis. Input values should come from professional ultrasound measurements. A single measurement may have margins of error; it is recommended to make comprehensive judgments combined with cycle monitoring data. Privacy data is processed locally only and involves no cloud transmission.
Clinically, it is recommended to start monitoring from day 10 of the menstrual cycle. Typical input example: If the three diameters of a dominant follicle are 20mm, 22mm, and 19mm, the average diameter is 20.3mm, which will display a green badge. Note that if the follicle shape is irregular, the maximum diameter should be used as the basis for judgment.
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