Inclined Positioning and Infant Gastroesophageal Reflux

Inclusion Criteria: * born at \>= 34 weeks gestation * weight for age \>= 10th percentile * No serious medical conditions * English-speaking parent capable of consenting * Diagnosis of GER from healthcare provider (not necessary for controls) * 4 or more visible spit-ups (mouth or nose) per day for at least 5 days OR 2 or more spit-ups out of the nose per day for at least 5 days OR I-GERQ score \>=16 (not necessary for controls) * If applicable, parent willing to refrain from giving medication for GER for 12 hours prior to study participation Exclusion Criteria: * Signs of a more serious or complex illness including weight loss, lethargy, fever, excessive irritability/pain, bulging fontanelle, seizures, macro/microcephaly, bilious vomiting, hematemesis, chronic diarrhea, rectal bleeding, suspicions of GI obstruction * History of a Brief Resolved Unexplained Event (BRUE) * Use of a Home Apnea Monitor prescribed by a healthcare provider