Most babies begin to outgrow the reflux between 6 and 9 months, the age at which they also start spending more time in the upright position, which itself lessens regurgitation. The following feeding and positioning tips will help minimize acid reflux.ost babies begin to outgrow the reflux between 6 and 9 months, the age at which they also start spending more time in the upright position, which itself lessens regurgitation. The following feeding and positioning tips will help minimize acid reflux.