Week 24 Ultrasound: Watching Your Baby Grow

Reaching the 24-week mark is often accompanied by a profound sense of relief and excitement. For many of the mothers who visit me at Baby Studio 4D in Raleigh, this week feels like a finish line for the “uncertainty” phase and the starting block for the “getting ready” phase. It is the week where your baby transitions from a tiny fetus into a truly viable little human being.

At this stage, your pregnancy is likely very visible to the world, and you are feeling those kicks—or perhaps somersaults—more consistently than ever. But while you can feel them, nothing compares to the magic of seeing what they are actually doing in there. A 24 week ultrasound is a unique “sweet spot” in our complete week-by-week ultrasound timeline because it offers a glimpse of a baby that is fully formed but still small enough to move with incredible agility.

(Disclaimer: Elective ultrasounds are for keepsake purposes only and do not replace medical care from your OB-GYN or healthcare provider.)

The Milestone of Viability: A Heartfelt Moment

In the medical world, week 24 is a monumental turning point. It is widely considered the “age of viability.” This means that if your baby were to be born now, they would have a chance of survival with the help of specialized neonatal care. When I share this with parents during their session, the room often fills with a heavy, beautiful emotion.

Seeing your baby at this stage reinforces that reality. You aren’t just looking at images; you are looking at a person who is practicing for life on the outside. Because you’ve likely already completed your week 20 anatomy scan, the 24-week elective visit is purely about the joy of connection and seeing how much they’ve grown in just one month.

What Your Baby Looks Like: Filling Out the Features

If you had a scan earlier in your second trimester, you might have noticed the baby looked a bit “skinny.” At 24 weeks, that is starting to change. Your baby is beginning to deposit “brown fat” under the skin, which helps them regulate body temperature after birth.

During your 24 week ultrasound, you will notice that the facial features are becoming much more defined. The nose and lips are distinct, and the eyes—though still fused shut—are fully formed. They are even starting to grow eyelashes and eyebrows! It is during this window that I often hear parents start the famous debate: “He definitely has his father’s nose!”

Sensory Development and Movement

Your baby’s senses are exploding right now. They can hear your voice, the beating of your heart, and even loud noises outside the womb. During a 4D session, we often see babies jump or move in response to a sudden sound or the sonographer’s wand.

They are also incredibly active. Since they still have a generous amount of amniotic fluid relative to their size, they can do full flips. We often catch them sucking their thumbs or grabbing their tiny feet. Watching these deliberate movements is an essential part of our pregnancy ultrasound timeline guide.

The Transition to 3D and 4D Imaging

While 2D imaging is great for checking growth, the 24th week is where 3D and 4D technology really starts to shine. Because the baby is putting on weight, the “surface rendering” (the skin-like view) looks much more realistic.

If you are trying to decide when to book, keep in mind that while 24 weeks is great, the week 28 ultrasound is often when facial features become even “chubbier.” However, many parents choose 24 weeks because the baby is easier to capture in their entirety. As the baby gets bigger, like we see in the week 32 ultrasound, we have to focus on specific body parts rather than seeing the whole baby at once.

Preparing for Your 24-Week Scan

To get the best possible images during your 24 week ultrasound, hydration remains your best friend. I tell all my Raleigh moms that the amniotic fluid is our “window.” The clearer and more abundant that fluid is, the sharper your 3D photos will be.

Try to drink at least 80-100 ounces of water daily for the week leading up to your visit. Unlike medical scans where you might need a painfully full bladder, for a 24-week elective scan, you can be comfortable! We want you relaxed so you can enjoy every second of watching your little one grow.

Your Next Step: Celebrating the Journey

The second trimester is often called the “honeymoon phase” for a reason—you’re likely feeling more energetic and the morning sickness has hopefully faded. Use this time to bond. A 24-week session is a perfect way to celebrate your progress and keep the excitement building as you head toward the home stretch.

If you are ready to see those eyelashes and watch those tiny fingers move, we would love to welcome you to our studio. We specialize in creating an atmosphere where you can slow down and just be “mom” for an hour.

Schedule your bonding session today and create memories that will last long after the pregnancy is over.