Modesto & Fresno Locations
Modesto 209-551-BABY (2229) | Fresno 559-292-PEEK (7335)
3D / 4D / HD Ultrasound

When to Peek

Week 12: Heartbeat

Come in to hear your babies heartbeat as early as 12 weeks.

Week 15 - 24: Gender Determination

Find out if it is a boy or a girl. To ensure 100% accuracy we recommend you be at least 17 weeks. However, sometimes the sac on a boy does not drop until 20 weeks. See our gender and sneak peek packages for more information.

Week 20 - 24: Early 3D/4D Viewing

Want an early peek? This is a great time for that. See the baby early on, then do a second peek when you are further along, and see the different stages of development. Keep in mind at this stage the baby looks small and is just starting to develop fat. The Sneak Peek is a great package for this stage.

Week 25 - 30: Best 3D/4D Viewing

Make your appointment during this time and you may see amazing activities such as her yawning after a nap or him sucking on his thumb. Often times you can even catch your baby looking right back at you! We love the 25-30 week time frame. See our 3D/4D packages for more details.

Week 30 - 33: Good 3D/4D Viewing

Want another peek? There is still fairly good movement during the 30-33 week period. If you have already had a 3D 4D Sonogram at 20-29 weeks or if this is your first time, this is your second best opportunity to make an appointment. The sooner the better... so please don't delay! See any of our 3D/4D packages for this stage.

Week 34 - 37: Unpredictable Viewing

After 33 weeks, it becomes difficult to get a good view due to the limited movement of the baby at this time. We have successfully completed 3D/4D ultrasounds all the way through 38 weeks, but these results are not typical. We will happily schedule an appointment during this time, however, please be aware it is unlikely your session will be as successful as earlier weeks in your pregnancy.

How to Prepare

How to Prepare


  1. Drink 10-12 8oz glasses of water per day several (5-7) days prior to your appointment as well as the day of your appointment. You do not need to have a full bladder when you come in. It is extremely important to keep hydrated several days prior to your appointment as the image above shows. Not doing this will result in poor quality pictures.
  2. Empty your bladder 1 hour prior to your appointment.
  3. If you are not diabetic or do not have any sugar issues drink a glass of orange juice or apple juice 30 minutes prior to your appointment.
  4. Arrive with your guests 15 minutes prior to your scheduled time.