The uterus is the cradle of life. During a fertility assessment, evaluating the uterus is not just about checking for diseases like fibroids; it is about ensuring the environment is perfect for an embryo to implant. Here is how we evaluate a normal uterus using ultrasound.

1. Anatomy and Dimensions

The uterus is a pear-shaped organ consisting of a body, a cervix, and two fallopian tubes. Its size naturally fluctuates based on a woman’s age and whether she has previously given birth.

• Reproductive Age Size: Typically 7 cm in length and 4 cm in width.
• Position: It can be Anteverted (tilted forward) or Retroverted (tilted backward). Both are considered normal anatomical variations.

2. How the Scan is Performed

For the most accurate measurements, a Transvaginal Ultrasound (TVS) is used.

• Midsagittal View: This view captures the uterine fundus, isthmus, and cervix in one frame. It is used to measure the length and depth (anteroposterior dimension) of the uterus.
• Transverse View: By rotating the transducer 90 degrees, we measure the maximum width of the uterus.
• Surrounding Organs: We also assess the relation of the uterus to the bladder, ovaries, and bowels.

3. The Endometrium: Mapping Your Cycle

The lining of the uterus (endometrium) changes dramatically during the menstrual cycle. Tracking these changes is vital for Endometrial Receptivity.

[Image of the layers of the uterus]

Signs of a Receptive Uterus:

For a successful pregnancy, we look for:

• A Triple Layer appearance.
• A minimum thickness of 7 mm.
• Increased blood flow on Color Doppler studies.
• A clear layer of mucus in the cervical canal (indicating healthy estrogen levels).

In the field of reproductive medicine, ultrasound is the most fundamental diagnostic tool. It allows us to visualize the uterus, ovaries, and other pelvic structures with high precision. Depending on the clinical requirement, ultrasound is performed using two primary methods:

Clinical Benefits of Fertility Ultrasound

Ultrasound helps in the comprehensive evaluation of the reproductive system to detect any underlying issues:

• Uterus: We assess the size, shape, mobility, and position. We look for the Endometrial Thickness (ET) and use Color Doppler to predict uterine receptivity. It also helps detect fibroids, polyps, or adenomyosis.
• Ovaries: We measure ovarian volume and the Antral Follicle Count (AFC). It helps in identifying cysts (follicular, dermoid, or endometriotic) and tumors. Color Doppler of a dominant follicle helps assess oocyte quality.
• Fallopian Tubes: While normal tubes aren’t usually visible, conditions like Hydrosalpinx (fluid-filled tubes) are easily detected on USG.
• Adnexa: Identifying other pelvic masses, such as pedunculated fibroids or paraovarian cysts.

In the world of fertility, an ultrasound is much more than just a picture; it is a vital diagnostic window. It helps us understand your reproductive health and tailor a treatment plan specifically for you.

How Is It Done? TAS vs. TVS

Depending on your comfort and medical requirement, we use two methods:

Timing: When Should You Have A Scan?

In fertility treatments, the timing of the scan is crucial. We usually monitor on three specific days of your cycle:

• Day 2 (D2): To check Antral Follicular Count (AFC). A normal count is 5-10 follicles in each ovary. This helps us predict how your body will respond to treatment and rules out old cysts.
• Day 9 (D9): To look for the Endometrial Lining. We look for a “triple-layer” pattern and use color Doppler to ensure healthy blood flow for embryo receptivity.
• Day 21 (D21): To confirm secretory changes in the lining, ensuring the environment is ready for a pregnancy.