Follicular Study Test in Bangalore – Cost, Procedure & Normal Range

Q: What is a follicular study?

A follicular study (folliculometry) is a series of transvaginal ultrasound scans performed every 2–3 days from Day 9 of the menstrual cycle. Each scan measures the size of ovarian follicles to predict ovulation, which is the release of an egg. It is commonly used to time natural conception, IUI, and IVF treatments.

Q: What is the cost of follicular study in Bangalore?

A single follicular scan in Bangalore typically costs between ₹500 and ₹1,000. A complete monitoring cycle with multiple scans usually costs between ₹1,500 and ₹4,000, depending on the number of visits required. In many fertility centers, follicular monitoring is included within treatment packages.

Q: On which day of the menstrual cycle is the follicular study done?

A follicular study starts with a baseline scan on Day 2 or 3 of the menstrual cycle. Monitoring scans typically begin from Day 9 or 10 and continue every 2–3 days until ovulation occurs, usually between Day 12 and Day 18 in a 28-day cycle.

Q: What size follicle is needed for ovulation?

A dominant follicle needs to reach a size of 18–25 mm to be considered mature. At around 18–20 mm, ovulation can be triggered or may occur naturally. Follicles smaller than 18 mm are generally not mature enough for ovulation.

Q: What happens if the follicle does not rupture?

If a mature follicle does not rupture, it is called a Luteinised Unruptured Follicle (LUF). In such cases, the follicle remains visible on scans even after the expected ovulation time. Treatment may include an hCG trigger injection or evaluation for underlying conditions like PCOS or endometriosis.

Q: Is a follicular study scan painful?

A transvaginal follicular scan is generally not painful. Most women experience only mild discomfort or pressure during the procedure, which typically lasts 10–20 minutes. No anesthesia or special preparation is required, and an empty bladder is preferred.

Q: How many scans are needed in a follicular study?

A typical follicular study involves 3–6 scans, including a baseline scan, monitoring scans during follicle growth, a pre-ovulation scan, and a post-ovulation confirmation scan. The number may vary depending on the individual cycle and treatment plan.

Q: What is the difference between a follicular study and AMH test?

An AMH test is a blood test that measures ovarian reserve, indicating how many eggs remain. A follicular study is an ultrasound-based process that tracks follicle growth and ovulation in a real cycle. Both tests are complementary in fertility evaluation.

Q: Can a follicular study detect PCOS?

Yes, a follicular study can help detect PCOS. It may show multiple small follicles arranged around the ovary, often described as a 'string of pearls' appearance, along with lack of a dominant follicle. It also helps determine whether ovulation is occurring.

Q: What is a good endometrial thickness during follicular study?

An endometrial thickness of 8–12 mm with a trilaminar pattern at the time of ovulation is considered optimal for implantation. A thickness below 7 mm may be considered thin and may require medical management.

A follicular study is a series of 3–6 transvaginal ultrasound scans done between Day 9 and Day 18 of your menstrual cycle to track how your ovarian follicles grow and predict the exact day of ovulation.

It is the most important diagnostic tool for timing natural conception, IUI, and IVF. A mature follicle ready for ovulation measures 18–25 mm. Cost in Bangalore: ₹500–1,000 per scan; ₹1,500–4,000 for a complete cycle of monitoring.

In this guide:

What is a follicular study — and why do you need one?
Who needs follicular monitoring?
Day-by-day scan schedule — what happens at each visit
Follicle size chart — what’s normal at each stage
Endometrial thickness during follicular study
Reading your follicular study report — normal vs abnormal
Role in IVF and IUI — how it guides treatment
Follicular study and PCOS
Follicular study cost in Bangalore 2026
Frequently asked questions

Your doctor has asked you to come in for a “follicular study” — and you are not entirely sure what that means or what to expect. This guide answers every question a patient at Janisthaa IVF Center Bangalore typically has: what the scans are looking for, what each day’s visit involves, how to read the report, and what the findings mean for your fertility treatment plan.

What Is a Follicular Study — and Why Do You Need One?

A follicular study, also called folliculometry or follicle tracking, is a series of transvaginal ultrasound (TVS) scans done at specific intervals during your menstrual cycle. The purpose is to watch your ovarian follicles — tiny fluid-filled sacs inside your ovaries, each containing a developing egg — as they grow, and to identify the precise moment one is ready to release that egg (ovulation).

Timing is everything in fertility. The egg survives for only 12–24 hours after ovulation. Sperm can live 48–72 hours. That means the fertile window is very narrow — approximately 3–5 days per cycle. Without follicular monitoring, couples and doctors are essentially guessing at timing. With it, the window is tracked in real time, every 2–3 days, until the exact date of ovulation is confirmed or predicted.

Why LH kits and period apps are not enough: Ovulation predictor kits (OPKs) detect the LH surge that precedes ovulation — but they miss anovulation (when no egg is released despite hormone changes), luteinised unruptured follicle (LUF) syndrome, and poor follicle quality. Follicular study catches all of these. For anyone undergoing fertility treatment, it is the gold standard.

Who Needs Follicular Monitoring?

You likely need a follicular study if you are:

Trying to conceive for 6+ months without success
On ovulation induction medication (Letrozole / Clomiphene)
Undergoing IUI treatment
Preparing for or in an IVF stimulation cycle
Diagnosed with PCOS, irregular periods, or anovulation
Over 35 and trying to conceive
Having cycles longer than 35 days or shorter than 21 days

What follicular monitoring tells your doctor:

Whether you are ovulating in this cycle
Whether the dominant follicle is growing at the right rate
The exact predicted date of ovulation
Whether ovulation actually occurred (follicle ruptured)
The thickness and quality of the uterine lining
How well ovulation-inducing medication is working
Whether OHSS risk is developing (in IVF cycles)

Day-by-Day Scan Schedule — What Happens at Each Visit

A typical follicular study cycle involves 4–6 scans spread across approximately 10–14 days. Each scan takes 15–20 minutes and uses the transvaginal route for the clearest view of the follicles.

Day 2 or 3 — Baseline Scan

Establishing your starting point

The cycle begins with a baseline scan on Day 2 or Day 3 of menstruation. This assesses: the resting appearance of both ovaries, the antral follicle count (AFC — number of small follicles visible), the uterine lining (which should be thin, around 4–6 mm at this stage), and any ovarian cysts that need to be resolved before treatment begins. This scan determines whether stimulation medication can be started and what dose is appropriate.

Day 9 or 10 — First Monitoring Scan

Watching for the dominant follicle

By Day 9–10, follicles that are going to develop in this cycle become visible and measurable (typically 8–12 mm). The doctor identifies the dominant follicle — the one growing fastest that will likely ovulate — and measures all visible follicles in both ovaries. The endometrial lining thickness is also recorded. In most women, one dominant follicle begins to emerge at this point while others remain small.

Day 11–13 — Active Growth Phase Scans

The follicle is growing 1–3 mm per day

During the active growth phase, the dominant follicle grows approximately 1–3 mm per day. Scans are done every 2–3 days (or daily if the follicle is close to mature). When the follicle reaches approximately 16–18 mm, the doctor prepares for the trigger injection or advises the optimal timing for intercourse or IUI. The uterine lining should now be thickening towards 7–10 mm in a trilaminar (triple-layer) pattern.

Day 13–16 — Pre-Ovulation Scan (Trigger Point)

Follicle at 18–25 mm — ready to release

Once the dominant follicle reaches 18–20 mm, it is considered mature and capable of releasing a healthy egg. At this point, the doctor may administer an hCG trigger injection (typically ovitrelle or HCG 5000–10000 IU) to trigger ovulation within 34–36 hours. The timing of intercourse, IUI, or IVF egg retrieval is calculated from this trigger point. The lining should ideally be ≥8 mm at this stage.

Day 14–18 — Post-Ovulation Confirmation Scan

Confirming the egg was released

The final scan in the cycle confirms whether ovulation actually occurred. Signs of successful ovulation: the dominant follicle has collapsed (disappeared or shrunk significantly), a small amount of free fluid is visible in the pouch of Douglas (behind the uterus), and the corpus luteum (a cyst-like structure) has formed in the ovary. If the follicle is still intact at this scan, it may be an unruptured follicle (LUF) — which requires further evaluation.

Follicle Size Chart — What's Normal at Each Stage

Cycle Day (28-day cycle)	Dominant Follicle Size	Status	Clinical Action
Day 2–3 (baseline)	2–8 mm (antral follicles)	Resting — normal	Baseline scan, start medication if indicated
Day 9–10	8–12 mm	Early growth — normal	Confirm dominant follicle emerging, continue monitoring
Day 11–12	12–16 mm	Active growth — on track	Scan every 2 days, watch lining thickness
Day 13–14	16–18 mm	Approaching mature — near trigger zone	Plan trigger injection timing, advise timed intercourse or IUI timing
Day 14–16 ✅	18–25 mm	Mature — ready for ovulation	Trigger injection given or natural ovulation imminent. IUI / intercourse within 24–36 hours
Day 18+ (follicle still growing)	>25 mm — not rupturing	Unruptured — concern	Check for LUF syndrome; discuss intervention with doctor
No dominant follicle seen by Day 12	<10 mm, none developing	Anovulatory cycle — abnormal	Investigate — PCOS, low AMH, medication non-response

Follicle growth rate: In a stimulated cycle (on Letrozole or gonadotropins), the dominant follicle typically grows 1–3 mm per day. In a natural unstimulated cycle, growth may be slightly slower. Your doctor adjusts monitoring frequency based on this rate — once a follicle reaches 14–16 mm, scans are usually done every day or every other day.

Endometrial Thickness During Follicular Study — Why It Matters

Every follicular study scan also measures the uterine lining (endometrium). A thick, well-developed lining is essential for the embryo to implant successfully. The lining must be in the right condition at the time of ovulation — regardless of follicle size.

Endometrial Thickness at Ovulation	Pattern	Interpretation
8–12 mm ✅	Trilaminar (triple-layer)	Optimal — best implantation rates
7–8 mm	Trilaminar or bilayered	Acceptable — IUI or timed intercourse can proceed
Below 7 mm	Thin, homogeneous	Thin lining — may need investigation or oestrogen support before embryo transfer
Below 6 mm	Thin	Concerning — IUI or embryo transfer typically deferred; treatment to improve thickness recommended

What causes a thin uterine lining? Poor blood flow to the uterus, low oestrogen, previous uterine surgery or D&C, Asherman’s syndrome, or certain medications. If your lining is consistently thin during follicular monitoring, Dr. Shwetha may recommend oestrogen supplementation, low-dose aspirin (to improve blood flow), or further investigation before proceeding with IUI or IVF.

Reading Your Follicular Study Report — Normal vs Abnormal

Finding on Report	What It Means	What Happens Next
Dominant follicle 18–25 mm, lining 8–12 mm trilaminar, free fluid in pouch of Douglas	Ovulation has occurred — excellent cycle	Timed intercourse / IUI timing confirmed; beta hCG test in 14 days
Multiple follicles 15–20 mm after gonadotropin stimulation (IVF cycle)	Good ovarian response — ready for egg retrieval	Trigger injection given; egg retrieval scheduled 34–36 hours later
Single dominant follicle, slow growth (less than 1 mm/day)	Poor follicle development — may need medication adjustment	Increase stimulation dose or switch medication; review AMH
Dominant follicle reached 20mm but still present on next scan (not ruptured)	Luteinised Unruptured Follicle (LUF)	Trigger injection recommended; investigate recurring LUF
No dominant follicle developing by Day 14 (all <10 mm)	Anovulatory cycle — no ovulation this cycle	Investigate for PCOS, hypothyroidism, poor ovarian reserve; consider medication
Many small follicles (>12, each <10 mm), no dominant one, “string of pearls” appearance	PCOS pattern	Confirm PCOS diagnosis; adjust treatment; monitor carefully for OHSS risk
Thin lining (<7mm) at time of mature follicle	Endometrial receptivity issue	Consider oestrogen supplementation; defer IUI/embryo transfer if lining does not improve

Role of Follicular Study in IVF and IUI

In IUI (Intrauterine Insemination)

Follicular monitoring is essential in every IUI cycle — natural or stimulated. The IUI procedure must be performed within 12–36 hours of ovulation for any chance of success. Without follicular study, the timing is guesswork. With it, the window is precisely identified. At Janisthaa IVF, every IUI cycle includes follicular monitoring as standard. Once the dominant follicle reaches 18–20 mm, the trigger injection is given and the IUI is scheduled exactly 36 hours later.

In IVF Stimulation Cycles

In IVF, the goal is different — instead of one egg, the protocol aims to stimulate multiple follicles to grow simultaneously. Follicular monitoring during an IVF stimulation cycle serves to:

Track how many follicles are developing and their growth rate
Adjust the stimulation dose daily based on follicle response
Identify the optimal moment for egg retrieval — when most follicles are 17–20 mm
Monitor for Ovarian Hyperstimulation Syndrome (OHSS) risk — if too many follicles develop (especially in PCOS patients), the retrieval may be delayed or a freeze-all strategy used
Confirm endometrial readiness before a fresh embryo transfer

How many scans in an IVF cycle? In a stimulated IVF cycle, follicular monitoring scans are typically done every 2 days from Day 2, then daily once follicles approach 14 mm. Most IVF cycles require 5–8 monitoring scans across the stimulation period. At Janisthaa IVF, all stimulation monitoring is conducted at our three Bangalore centres and results are reviewed by Dr. Shwetha personally.

Follicular Study and PCOS — What's Different

PCOS (Polycystic Ovary Syndrome) is the most common cause of ovulatory infertility, and follicular monitoring takes on a particularly important role in PCOS management.

Aspect	Normal Cycle	PCOS Cycle
Antral follicle count (baseline)	5–15 follicles per ovary	12+ follicles per ovary (“string of pearls”)
Dominant follicle development	One clear dominant follicle by Day 10–12	Multiple small follicles competing; no clear dominant; may arrest
Ovulation	Predictable — Day 14–16 in a 28-day cycle	Unpredictable or absent — cycles may be 35–90 days
Response to medication	Usually responds well to low-dose Letrozole	May over-respond — OHSS risk; requires very close monitoring
Endometrial pattern	Normal trilaminar pattern by Day 14	May be thin or irregular — particularly with long anovulatory cycles

At Janisthaa IVF Bangalore, PCOS patients on ovulation induction are monitored especially carefully — typically with more frequent scans and lower medication doses to reduce OHSS risk. Dr. Shwetha uses individualised protocols for every PCOS patient rather than a standard dose schedule.

Follicular Study Cost in Bangalore 2026

Type of Scan	Cost at Standalone Lab	Cost at Fertility Clinic	Notes
Single follicular scan (one visit)	₹500 – ₹1,000	₹800 – ₹1,500	Each individual scan visit
Complete follicular study (3 visits)	₹1,500 – ₹2,500	₹2,000 – ₹4,000	Most natural cycle monitoring
Complete follicular study (5–6 visits)	₹2,500 – ₹5,000	₹3,000 – ₹6,000	Stimulated cycles / PCOS cycles
IVF stimulation monitoring (all scans)	Varies	Included in IVF package at Janisthaa (from ₹1,00,000 + medications)	All monitoring scans in an IVF cycle included

At Janisthaa IVF Center Bangalore, follicular monitoring scans for patients undergoing ovulation induction, IUI, or IVF are performed at all three of our locations: Basaveshwar Nagar, RR Nagar, and Malleshwaram. You can attend scans at whichever centre is most convenient on each visit day. Call +91 95911 11407 to check current monitoring package rates.

Dr. Shwetha Y Baratikkae — on follicular monitoring at Janisthaa IVF

“Follicular monitoring is not just a scan — it is a real-time conversation between the patient’s body and the treatment plan. Every number we get at each visit — the follicle size, the lining thickness, the growth rate — shapes what we do next. I personally review every monitoring report before adjusting medication doses or scheduling a trigger. It is the most individualised aspect of fertility treatment, and it should never be rushed.”

20+ years experience | 10,000+ successful pregnancies | IVF Specialist, Janisthaa IVF Bangalore

Ready to start your fertility monitoring at Janisthaa IVF?

Book a consultation with Dr. Shwetha — personalised follicular monitoring across all 3 Bangalore locations

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FAQs

1. What is a follicular study can?

A follicular study (folliculometry) is a series of transvaginal ultrasound scans performed every 2–3 days from Day 9 of your menstrual cycle. Each scan measures the size of ovarian follicles to predict ovulation — the exact moment an egg is released. It is the most accurate method to time natural conception, IUI, and IVF egg retrieval.

2.What is the cost of follicular study in Bangalore?

A single follicular scan in Bangalore costs ₹500–₹1,000 at diagnostic centres. A complete monitoring cycle of 3–5 scans costs ₹1,500–₹4,000, depending on the number of visits required. At Janisthaa IVF Center, follicular monitoring is included within ovulation induction and IVF treatment packages. Call +91 95911 11407 for current pricing.

3. On which day of the menstrual cycle is the follicular study done?

The follicular study begins with a baseline scan on Day 2 or 3 of your menstrual cycle. Regular monitoring scans start from Day 9 or Day 10, continuing every 2–3 days (and daily as ovulation approaches) until the follicle reaches 18–20 mm and ovulation occurs — typically between Day 12 and Day 18 in a 28-day cycle.

4.What size follicle is needed for ovulation?

A dominant follicle must reach 18–25 mm to be considered mature. At 18–20 mm, it is ready for a trigger injection (hCG) which causes ovulation within 34–36 hours. Ovulation can also occur spontaneously at this size in natural cycles. Follicles below 18 mm are not yet mature enough to release a viable egg.

5.What happens if the follicle does not rupture?

If a mature follicle fails to rupture and release the egg, it is called a Luteinised Unruptured Follicle (LUF). The follow-up scan will show the follicle still present despite the expected ovulation window having passed. Your doctor may recommend an hCG trigger injection to induce ovulation, or investigate underlying causes such as PCOS or endometriosis.

6.Is a follicular study scan painful?

A transvaginal follicular scan is generally not painful. Most women feel mild pressure or slight discomfort during the scan, which lasts approximately 10–20 minutes. No anaesthesia is needed. No dietary restrictions apply. You do not need a full bladder for a transvaginal scan — the opposite is true, an empty bladder is more comfortable.

7.How many scans are needed in a follicular study?

A typical follicular study involves 3–6 scans: Day 2–3 baseline, Day 9–10 first monitoring, Day 11–13 active growth phase scans (every 2 days), a pre-ovulation scan near Day 14–16, a post-trigger confirmation scan, and a final scan to confirm rupture. In PCOS or stimulated cycles, more frequent scans may be needed.

8.What is the difference between a follicular study and AMH test?

AMH (Anti-Müllerian Hormone) is a blood test that measures your overall ovarian reserve — how many eggs you have remaining. A follicular study is a dynamic scan-based process that watches how follicles actually grow and release eggs in a real cycle. AMH answers “how many eggs do I have left?” while follicular monitoring answers “are my eggs growing and releasing correctly this cycle?” Both tests are complementary and used together in fertility evaluations.

9.Can a follicular study detect PCOS?

Yes. In PCOS, a follicular scan shows the characteristic appearance of 12 or more small follicles (each under 10 mm) arranged around the ovary — known as the “string of pearls” sign — with no dominant follicle developing to maturity. Follicular monitoring also confirms whether a woman with PCOS is actually ovulating in a given cycle, which home ovulation kits often miss.

10. What is a good endometrial thickness during follicular study?

At the time of ovulation, an endometrial (uterine lining) thickness of 8–12 mm with a trilaminar (triple-layer) pattern is considered optimal for implantation. A lining below 7 mm is considered thin. If your lining is consistently thin during monitoring cycles, Dr. Shwetha may recommend oestrogen supplementation, low-dose aspirin, or further investigation before IUI or embryo transfer is attempted.

Follicular Study Test in Bangalore – Cost, Procedure & Normal Range

What Is a Follicular Study — and Why Do You Need One?

Who Needs Follicular Monitoring?

You likely need a follicular study if you are:

What follicular monitoring tells your doctor:

Day-by-Day Scan Schedule — What Happens at Each Visit

Establishing your starting point

Watching for the dominant follicle

The follicle is growing 1–3 mm per day

Follicle at 18–25 mm — ready to release

Confirming the egg was released

Follicle Size Chart — What's Normal at Each Stage

Endometrial Thickness During Follicular Study — Why It Matters

Reading Your Follicular Study Report — Normal vs Abnormal

Role of Follicular Study in IVF and IUI

In IUI (Intrauterine Insemination)

In IVF Stimulation Cycles

Follicular Study and PCOS — What's Different

Follicular Study Cost in Bangalore 2026

Dr. Shwetha Y Baratikkae — on follicular monitoring at Janisthaa IVF

Ready to start your fertility monitoring at Janisthaa IVF?

FAQs

1. What is a follicular study can?

2.What is the cost of follicular study in Bangalore?

3. On which day of the menstrual cycle is the follicular study done?

4.What size follicle is needed for ovulation?

5.What happens if the follicle does not rupture?

6.Is a follicular study scan painful?

7.How many scans are needed in a follicular study?

8.What is the difference between a follicular study and AMH test?

9.Can a follicular study detect PCOS?

10. What is a good endometrial thickness during follicular study?

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