Follicular Monitoring
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About Follicular Monitoring
When is Follicular Tracking Started in a Cycle?
When and How often will I need to get an Ultrasound?
The goal is always to pinpoint the optimal ovulation day based on follicle maturity. Starting scans early enough to detect the beginning of follicle growth is important.
Mature follicles are usually between 18-25 mm. The doctor also checks how thick your uterine lining is to make sure it’s ready for a fertilized egg to snuggle in.
Ovarian follicles are small sacs in the ovaries that contain immature egg cells (oocytes)
At birth, women have a lifetime supply of several hundred thousand follicles. This number declines with age through a process called atresia.
During each menstrual cycle, a cohort of follicles is recruited to start growing and developing. Typically only one follicle will reach full maturity and release an egg.
Follicular tracking, also known as follicle monitoring, is an important part of fertility care and treatment. It involves using ultrasound imaging to track the growth and development of ovarian follicles during a menstrual cycle. The purpose of follicular tracking is to monitor follicle growth, identify the optimal timing of ovulation, and guide decisions about fertility interventions like timed intercourse, intrauterine insemination (IUI), or in vitro fertilization (IVF).
Guiding Fertility Treatments: For women undergoing fertility treatments like Intrauterine Insemination (IUI) or In Vitro Fertilization (IVF), monitoring ensures that the timing for egg retrieval or insemination is optimal.
What is a Follicle?
Typically, the initial Ultrasound is done in the Second or third day of the menstrual cycle to provide a baseline and give a starting point to the rest of your cycle.
Subsequent Ultrasounds are done every 1-3 days to track egg growth. This helps with determining timing for ovulation and procedures.
At critical decision points closer to ovulation, daily ultrasounds are often needed to time procedures precisely and avoid premature ovulation.
At each Ultrasound, the number, sizes, and locations of visible follicles are measured and recorded. The pattern of growth from baseline provides important information to your Doctor.
How are the Ultrasounds performed? What should I expect?
The Ultrasound is performed with a transvaginal transducer. The technologist puts a special wand (called a transducer) into your vagina to get a good look at your ovaries. They measure how big your follicles are and count how many you have.
Follicle monitoring typically involves a series of transvaginal ultrasound scans. These scans provide a clear view of the ovaries and allow the doctor to measure the size and number of developing follicles.
The first baseline scan usually takes about 15-30 minutes.
The follow-up scans are a bit quicker, around 10-20 minutes each, and you’ll have them every 1-3 days.
The ultrasound scans indicate whether the follicles have grown to the right size and the number of follicles that have developed. Results and images are sent to your Doctor same day, typically a short time after exam..
Several parameters are assessed during each follicular tracking ultrasound:
Number of Follicles - The total number of follicles visible in each ovary.
Size of Follicles - The diameter of each follicle is measured. Mature follicles ovulate around 18-24 mm.
Dominant Follicle - The largest, most mature follicle that will likely ovulate.
Ovulation - Follicles may show collapse, fluid or blood when the egg releases.
Ovaries & Uterus - Screen for abnormalities in anatomy, fibroids, cysts etc.
Endometrial Lining - The thickness of the uterine lining should reach around 8 mm for implantation.
Monitoring all these parameters provides an overall picture of menstrual cycle health and how follicles are progressing each day.
How are the Ultrasounds performed? What should I expect?
The Ultrasound is performed with a transvaginal transducer. The technologist puts a special wand (called a transducer) into your vagina to get a good look at your ovaries. They measure how big your follicles are and count how many you have.
Follicle monitoring typically involves a series of transvaginal ultrasound scans. These scans provide a clear view of the ovaries and allow the doctor to measure the size and number of developing follicles.
The first baseline scan usually takes about 15-30 minutes.
The follow-up scans are a bit quicker, around 10-20 minutes each, and you’ll have them every 1-3 days.
The ultrasound scans indicate whether the follicles have grown to the right size and the number of follicles that have developed. Results and images are sent to your Doctor same day, typically a short time after exam..