The Alberta BLOOM Premature Child Study

Inclusion Criteria Child Inclusion Criteria: 1. Less than 8 days of age or previous participation in one of the BLOOM-PTN, BLOOM-LTFU, Pregnancy During the Pandemic or PROBIO studies; 2. Born at ≤ 36 weeks + 6 days gestation (36 6/7 weeks gestational age) 3. For babies recruited shortly after birth, be expected to survive more than one week; Mother/Parent/Legal Guardian Inclusion Criteria: 1. Provide a signed and dated consent form; 2. Be able to speak and understand English; 3. Be 16 years of age or older; 4. Be willing to comply with all study procedures and be available for the duration of the study; 5. If recruited as a previous participant of the BLOOM-PTN, BLOOM-LTFU, Pregnancy During the Pandemic and/or PROBIO studies, must be willing to attend clinic visit(s) at the Alberta Children's Hospital in Calgary, Alberta at 1 and 3 years Corrected Gestational Age, or 6. If recruited within 8 days of birth, must reside within the Calgary Metropolitan Region. Exclusion Criteria Child Exclusion Criteria: 1. Has major congenital or chromosomal anomalies, including any congenital gastrointestinal anomalies 2. Children recruited within 8 days of birth who have a history of gastrointestinal surgery at the time of recruitment Mother/Parent/Legal Guardian Exclusion Criteria: 1. Not the legal guardian of the child or 2. In a legal guardianship dispute.