What to Wear to an Ultrasound (and How to Prepare for Your Best Session)

A two-piece outfit — like a tank top and maternity leggings — makes your session easier and m ore comfortable from the very first moment.

You have been looking forward to this appointment for weeks. You have picked your date, marked your calendar, and t old everyone who would listen. Now the question sitting in the back of your mind is a practical one: what do you actuall y wear to an ultrasound? And is there anything else you should do ahead of time to help the session go smoothly?

Knowing what to wear to an ultrasound — and how to prepare your body in the days leading up to your visit — makes a real difference in how clear your images turn out and how comfortable you feel throughout the experience. This guide co vers everything you need to know before you walk through the door at Behind the Bump HD in Knoxville, TN.

What to Wear to Your Ultrasound Appointment

The most important thing to know about what to wear to an elective ultrasound is this: the sonographer needs easy a ccess to your belly. That means anything that requires removing entirely or that creates uncomfortable pressure on your midsection is going to make the experience harder than it needs to be. The goal is an outfit that gets out of the way qu ickly, comfortably, and without a whole production.

The Best Choice: A Two-Piece Outfit

A two-piece combination is by far the easiest option. Think of a fitted maternity tank top or a regular top that ca n be rolled up, paired with maternity leggings or pants that have a fold-down waistband. This gives the sonographer full belly access in seconds, lets you stay comfortable in the reclining position throughout your session, and means you nev er have to fully undress or feel exposed.

Great Specific Options

• Maternity tank top or fitted tee with maternity leggings
• A loose button-front shirt that can be opened at the bottom and tied up
• A stretchy crop top or sports bra style top with high-waisted leggings
• Any top that lifts or rolls easily over the belly
• Maternity pants, yoga pants, or any bottoms with a soft, fold-down waistband

What to Avoid Wearing

• One-piece dresses — these require full undressing for belly access
• Rompers or jumpsuits — same issue, twice as complicated
• Tight waistbands that sit directly on your belly and dig in when you recline
• Complicated layers that take time to remove or adjust
• Anything you would be uncomfortable having pushed up or folded down

A Note on Lotion and Skin Products

Skip any lotion, oil, or heavy moisturizer on your belly on the day of your ultrasound. Residue from these products can create a barrier between the skin and the ultrasound gel, which can affect the acoustic contact and image clarity. A clean, dry belly surface gives the best results. Light makeup, perfume on your wrists or neck, or nail polish are all completely fine — just keep the belly itself product-free.

Why Hydration Is the Single Best Thing You Can Do

If you remember only one piece of preparation advice, make it this: drink more water than usual in the several days before your session. Hydration is the single most impactful preparation step you can take, and it is entirely within yo ur control.

Here is why it matters. Amniotic fluid is largely made up of water. The clearer and more abundant that fluid is, th e better the acoustic environment for ultrasound imaging. When fluid levels are high and clear, the sound waves travel m ore cleanly through the fluid, and the images that come back are sharper, more detailed, and easier to work with. When f luid is lower or cloudier, images can look hazier and less defined — no matter how good the equipment is.

In our experience working with families at Behind the Bump HD, the sessions with the most stunning image results al most always belong to moms who made a conscious effort to drink more water in the days before they came in. It is not ma gic — it is just good preparation.

How Much Water Should You Drink?

During pregnancy, general guidance from most OBs and midwives is around 8 to 10 cups of water per day. In the three to five days before your keepsake ultrasound session, aim for the higher end of that range, or add one to two extra gla sses to whatever your normal intake is. Herbal teas, water-rich fruits like watermelon or cucumber, and clear broths all contribute to your overall hydration as well.

Should You Eat Before Your Session?

Yes — and the timing matters. Eating a light snack or small meal about 30 to 60 minutes before your appointment can help encourage baby to be more active during your session. When blood sugar rises after eating, babies often respond wi th more movement, which gives the sonographer better opportunities to capture different angles, expressions, and positio ns.

You do not need a full meal. A small snack like fruit, crackers, cheese, or a yogurt is perfectly effective. The go al is a gentle blood sugar bump, not a heavy stomach before lying down for your session.

What If You Are Booked for an Early Morning Appointment?

Even if your session is first thing in the morning, try to eat something small before you arrive. Skipping the snac k entirely is more likely to leave you with a sleepy, tucked-in baby than an active, cooperative one. A piece of toast, a handful of grapes, or a small smoothie before you leave the house is enough.

What About Juice?

Some families swear by a small glass of orange juice or apple juice 30 to 45 minutes before the session as a way to give baby an extra nudge. There is some anecdotal support for this among experienced sonographers, but it is not guaran teed to work. If juice is part of your normal routine during pregnancy, it is a reasonable thing to try. Just do not ove rdo it on an empty stomach.

Timing Your Visit for the Best Results

The time of day you book can influence how active your baby is during the session. Many families find that babies t end to be more active in the late afternoon and early evening — which is part of why Behind the Bump HD's extended weekd ay hours (open until 8:00 PM Tuesday through Friday) are so popular. Evening appointments often catch babies in their mo st lively window.

That said, every baby has its own rhythm. Some are morning movers. Some are most active right after a meal, regardl ess of the time of day. If you have noticed a pattern in your baby's activity, try to schedule your visit during their t ypically active period. Your own body awareness is genuinely useful information here.

For timing within your pregnancy, the week-by-week timing guide on the Behind the Bump HD blog covers every stage in detail — from early gender determination visits to the optimal 26 to 32 week window for HD facial imaging.

What to Bring With You

The good news is that you do not need to bring much. Behind the Bump HD handles everything you need for a great ses sion. That said, a few small things can make the experience even smoother:

• A water bottle — sip water right up until your appointment time to stay hydrated.
• A light snack — if you did not eat before leaving home, bring something small you can have in t he car on the way.
• Your phone or camera — you will want to capture this moment, and you may want to live-stream or video call family members who could not make the trip.
• Comfortable layers — the studio is climate-controlled, but bringing a light cardigan means you can adjust if you feel warm or cool during your session.
• Your pregnancy information — knowing your current gestational age helps the sonographer tailor the session to the right approach for your stage.

Day-of Checklist

Use this simple checklist the morning of your keepsake ultrasound appointment:

• Outfit chosen — two-piece, comfortable waistband, easy belly access
• No lotion or oil applied to your belly
• Water intake maintained over the past several days
• Light snack eaten 30 to 60 minutes before your arrival time
• Water bottle packed for the drive
• Phone charged for photos and potential video sharing
• Guests confirmed — anyone you want in the room is welcome
• Booking confirmed with Behind the Bump HD — call (865) 333-8925 if you have last-minute questions

Managing Expectations About Baby's Cooperation

Here is the honest truth about elective ultrasound that every family should know going in: baby gets a vote. No amo unt of preparation can guarantee a fully cooperative baby on the day of your session. Some babies nestle face-down towar d the placenta. Some tuck their hands across their face the entire time. Some sleep through the whole thing despite your best snack-timing efforts.

This is not a failure of preparation — it is just baby doing baby things. The sonographers at Behind the Bump HD ar e experienced at working through uncooperative positions. They use techniques to encourage movement, try different angle s, and make the most of every opportunity baby gives. Some of the most memorable sessions happen when things do not go a ccording to plan and baby suddenly decides to cooperate in the most charming way possible.

Going in with a spirit of curiosity rather than rigid expectations makes the whole experience more enjoyable. You a re not directing a photoshoot — you are getting a glimpse into your baby's world, on their terms. That unpredictability is part of what makes it so real.

The American College of Obstetricians and Gynecologists offers helpful general guidance on prenatal care and monito ring that complements your keepsake ultrasound experience: acog.org.

Frequently Asked Questions