Expecting parents often look forward to an ultrasound, especially for detailed anatomy scans or 3D/4D sessions. However, a sleeping or uncooperative baby can make getting clear images a challenge. A baby’s position or lack of movement may obscure the necessary views, potentially requiring a repeat visit. Fortunately, several simple steps can be taken to encourage fetal movement before and during the appointment. Applying safe, gentle stimulation techniques increases the chances of a successful and complete examination.
Dietary Methods for Encouraging Fetal Activity
Consuming certain foods or beverages shortly before an ultrasound is the most common method used to encourage fetal activity. This works by temporarily increasing maternal blood glucose levels, which crosses the placenta to provide the baby with an energy boost. Drinking about eight ounces of a naturally sugary beverage, such as orange or apple juice, 20 to 30 minutes before the scan often prompts movement. Alternatively, consuming a small piece of chocolate or a cold drink can also be effective. A sudden change in maternal internal temperature, often triggered by a cold liquid, may cause a reflexive startle.
Utilizing Physical Movement and External Stimuli
If the baby remains still during the scan, simple changes to the mother’s body position or external sensory cues can elicit a reaction. Changing the mother’s posture, such as rolling from one side to the other, can shift the baby’s position within the amniotic fluid. Standing up briefly and walking around the room before returning to the examination table is another effective technique. During the scan, the sonographer might apply gentle pressure or light tapping on the abdomen over the baby’s location, which often rouses a sleeping baby. Speaking or singing directly to the bump can also work, as the baby may respond to the familiar sound of a parent’s voice.
Understanding Fetal Sleep Cycles and Timing
Fetal movement is highly dependent on the baby’s natural sleep-wake cycles, which is a major factor in scan success. Babies in the womb spend the vast majority of their time sleeping, especially in later pregnancy. They cycle through periods of active and quiet sleep, with the deep sleep phase lasting around 20 to 45 minutes. If the ultrasound catches the baby during deep sleep, it may be resistant to stimulation until the cycle naturally shifts. Scheduling the appointment for a time when the baby is most active, often right after a meal or in the evening, increases the likelihood of cooperation.