Know exactly when you ovulate
Unlike ovulation predictor kits (which only predict), ultrasound directly visualises follicle growth and rupture – providing the most accurate timing for conception or insemination.
Follicular monitoring is a series of transvaginal ultrasound examinations that track the growth and development of ovarian follicles throughout the menstrual cycle. It is an essential tool in fertility assessment and treatment – helping determine the optimal time for natural conception, intrauterine insemination (IUI), or egg retrieval in IVF cycles.
Each month, a woman's ovaries develop several follicles, one of which becomes dominant and releases a mature egg at ovulation. Follicular monitoring measures the size and number of these follicles, assesses endometrial thickness, and predicts when ovulation will occur. This information is critical for timing intercourse, insemination, or triggering ovulation in assisted reproduction.
At Amytri, our follicular monitoring is performed by experienced consultant radiologists using state‑of‑the‑art transvaginal ultrasound. We provide clear, timely reports after each scan and work closely with your fertility specialist to coordinate treatment. Our compassionate approach and flexible scheduling make the process as convenient and stress‑free as possible.
Follicular monitoring removes the uncertainty from ovulation timing – giving you and your specialist the information needed to optimise conception.
Unlike ovulation predictor kits (which only predict), ultrasound directly visualises follicle growth and rupture – providing the most accurate timing for conception or insemination.
In IUI and IVF, follicular monitoring ensures procedures are performed at the optimal time, significantly improving pregnancy rates.
In fertility treatment, monitoring follicle growth and numbers helps your specialist adjust medication doses – ensuring an optimal response without over‑stimulation.
We perform serial transvaginal ultrasound examinations to follow the growth and maturation of ovarian follicles.
We count the number of small resting follicles (2‑10 mm) in both ovaries on day 2‑3 of the cycle – a key measure of ovarian reserve and response to stimulation.
We measure the diameter of individual follicles in each ovary. A mature follicle is typically 18‑24 mm. Serial measurements track growth velocity – usually 1‑2 mm/day.
We identify the dominant follicle – the one that is destined to ovulate. This follicle becomes larger than the others and appears well‑defined.
We measure endometrial thickness (in mm) and assess its trilaminar pattern – a thick, trilaminar endometrium is associated with optimal implantation.
After ovulation, we check for follicular collapse, the presence of free fluid in the pouch of Douglas, and the formation of a corpus luteum – confirming that ovulation has occurred.
In cycles with fertility medication (clomiphene, letrozole, gonadotropins), we monitor the number and size of follicles to guide dosing and timing of hCG trigger.
We perform the first scan at the beginning of your cycle to assess ovarian reserve (antral follicle count) and baseline endometrial thickness. We rule out ovarian cysts or other abnormalities.
We schedule follow‑up scans every 2‑3 days to measure follicle growth, identify the dominant follicle, and assess endometrial development. The frequency depends on your cycle and treatment plan.
When the dominant follicle reaches 18‑24 mm (and the endometrium is ≥7‑8 mm), your specialist may recommend a hCG trigger – and we time IUI, IVF retrieval, or natural intercourse accordingly.
A final scan, usually 3‑5 days after the trigger, confirms ovulation by demonstrating follicular collapse and free fluid – providing reassurance that the cycle is proceeding as planned.
It is an essential part of fertility evaluation and treatment for many women and couples.
Follicular monitoring confirms that ovulation is occurring and helps identify ovulatory disorders – a key step in infertility work‑up.
Women taking clomiphene, letrozole, or gonadotropins need monitoring to track response and avoid ovarian hyperstimulation.
Monitoring ensures that insemination or intercourse occurs at the exact time of ovulation, maximising the chance of conception.
In IVF, monitoring follicle growth and number is essential for determining the timing of egg retrieval and adjusting medication doses.
Women with irregular or absent periods may not know when they ovulate – monitoring provides clarity.
Monitoring can assess luteal phase and endometrial quality – factors that may contribute to pregnancy loss.
Dr. Abhishek has extensive experience in reproductive ultrasound, including follicular monitoring, antral follicle counting, and endometrial assessment. He works closely with fertility specialists to ensure accurate, timely information that supports successful treatment outcomes.
Fertility journeys can be stressful – having your partner with you provides support and shared understanding at each step.
We welcome partners to attend follicular monitoring scans. We explain what we are seeing, discuss the timing, and answer questions together. This helps both of you stay informed and engaged in the treatment process.
Follicular monitoring is a series of transvaginal ultrasound scans that track ovarian follicle growth, predict ovulation, and assess endometrial development – helping to optimise the timing of conception or fertility treatment.
The first scan is usually on day 2‑3 of your menstrual cycle (baseline). Follow‑up scans begin around day 8‑12 and continue every 2‑3 days until ovulation is confirmed. Your specialist will give you a personalised schedule.
The transvaginal ultrasound is generally not painful – you may feel slight pressure or discomfort, but it is well‑tolerated. We ensure your comfort throughout.
Typically 2‑4 scans per cycle, depending on your cycle length, response to medication, and treatment plan. Your specialist will advise the number.
A mature follicle is typically 18‑24 mm in diameter, well‑defined, and round or oval. The endometrium should be ≥7‑8 mm with a trilaminar (three‑layer) appearance.
Yes, a referral from a fertility specialist or gynaecologist is recommended, as they will interpret the results and plan your treatment accordingly. We work closely with your specialist to provide timely reports.
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